Carpal Tunnel Syndrome: Symptoms and Causes

From Dr. Z - Carpal tunnel syndrome specialist

Carpal Tunnel Syndrome: Symptoms and Causes

Table of Contents

Overview

Symptoms

  1. Numbness And Tingling
  2. Pain
  3. Weakness

What To Do

When To See A Doctor

Causes

  • Primary Risk Factors
  • Sex
  • Wrist Anatomy
  • Neuropathy-Causing Disorders
  • Inflammatory Disorders
  • Drugs
  • Obesity
  • Changes In Body Fluids
  • Various Medical Disorders
  • Workplace

1) Vibrating Tool Use

2) Constant Grip-And-Release

3) Prolonged Gripping

4) Rapid And Repetitive Movements

5) Prolonged Pinching

6) Maintaining A Bent (Extended) Hand

7) Working In The Cold

Carpal Tunnel Prevention

  • Avoidance
  • Reduce The Workplace Impact
  • Maintain Good Posture
  • Rest
  • Stretching Exercises
  • Warm Hands

Summary

FAQs

About

Overview

Carpal tunnel syndrome is one of the most common hand disorders in the USA. It is characterized by one or more of the following symptoms in the palm or fingers: pain, numbness, tingling, burning, weakness, clumsiness, shooting electric shocks, and puffy feelings. These symptoms occur when the median nerve, deep within your wrist joint, becomes irritated due to swelling and compression by adjacent tissues. Several factors can cause the compression like wrist anatomy, metabolic disturbances, overall health, and swollen flexor tendons. Treatments can vary according to your severity stage (Mild, Moderate or Severe). Most stages of carpal tunnels syndrome can be treated with home remedies. More severe stages may require surgery. The key to any therapy is early intervention; the earlier treatment begins, the more complete the restoration of your hand function. 



woman with a pained face

Symptoms

Carpal tunnel syndrome can affect anyone, and at any age. However, the distribution for the majority of carpal tunnel incidences in male patients is between 50 and 59 years and again between 70 and 79 years. The incidence in women usually increases with age, peaking between 50 and 59 years, and declining afterwards.


It is uncommon for the symptoms of carpal tunnel syndrome to begin rapidly. But following trauma, such as a sprained wrist, it can occur within a week of the injury.


For most patients this disorder starts very gradually. Sometimes the progression is imperceptible. In fact, most patients attribute initial symptoms to a tired or overworked hand. Most often, these initial symptoms appear only while trying to sleep. They can include feelings like:

mother and daughter

• Numbness And Tingling

Numbness and tingling typically occur in the fingertips and palm of the hand. The thumb and pointer fingers are most frequently involved However, the pinky finger is never affected since it is served by the ulnar nerve and not the median nerve. Tingling and numbness can wake you with the feeling of having to shake your hand.

• Pain

The feeling of pain can be described as aching, throbbing, shooting, itching or burning. Initially, the pain is intermittent. As symptoms begin to appear during the day, they usually occur while holding an object. Using a steering wheel, tying a shoelace or grasping a pan handle may cause symptoms to appear. When grasping a n object like a coffee mug, you may feel electric shocks shooting from your fingers and hand and up your arm.

• Weakness

In almost every case of carpal tunnel syndrome patients experience hand weakness, especially as the condition advances. This is a result of having numbness (inability to feel) and weakness of the thumb muscles (another function of the median nerve). Eventually this feels like clumsiness. Patients tend to drop objects, cannot turn a doorknob or pick up coins or keys.

woman trying to open a jar

What To Do

Most studies show that the earlier you intervene in treating carpal tunnel syndrome, the more complete your remission of symptoms. Also, the earlier yu treat, the faster you remission will occur. 



Mild stages are easiest to treat. However, most patients ignore symptoms at the Mild stage because they attribute it to tired or overworked hands. The majority of patient begin serious intervention in the Moderate or Severe stage of carpal tunnel syndrome. While symptoms are more difficult to treat then, you still have many good treatment options – both nonsurgical and surgical. 

When To See A Doctor

The American Academy of Orthopedic Surgeons recommends treating carpal tunnel syndrome with all conservative (nonsurgical) therapies first. If symptoms do not disappear, then surgery is usually recommended. Have tried the most effective nonsurgical therapies? Do your symptoms still interfere with your sleep or your daily activities? Then call your doctor immediately to discuss other treatment options. The last thing you want is for symptoms to progress through the Severe stage with treatment. That’s because you risk permanent median nerve and thumb muscle damage.

carpal tunnel passageway

Causes

The underlying reason for carpal tunnel syndrome is because of excessive pressure on your median nerve. This is a major nerve of your hand. It provides both sensation to your hand and fingers, as well as sending motor signals to various hand muscles for movement.



It travels the entire length or your arm, from your forearm to fingers. Inside your wrist, it travels through a passageway called the “carpal tunnel” (hence the name of the disorder). This passageway is surrounded by bony and stiff structures.

Besides the median nerve, this passageway is filled with blood vessels and flexor tendons. These are the tendons which pull on your finger to cause them to curl and grasp.


All of these structures inside the carpal tunnel space are relatively solid compared to the soft median nerve. Sometimes the tissues (especially the flexor tendons) inside the carpal tunnel experience the irritation and start to swell. But because of the compact and tight nature of that space, swelling gets transmitted to the medina nerve. That swelling compresses the median nerve, which is the reason we see all the symptoms of carpal tunnel syndrome.


Therefore, anything that irritates and compresses the median nerve inside the carpal tunnel space may result in carpal tunnel syndrome. For instance, fluid retention from pregnancy can cause swelling. So can a wrist fracture. Likewise, inflammation and swelling is caused by rheumatoid arthritis. For many people, the swelling occurs because the flexor tendons become irritated by repetitive stress or another mechanical strain. But the result is the same: compression of the median neve.


Sometimes, it’s impossible to point to one single cause of carpal tunnel syndrome. Other times, the cause is a complete mystery.


Most doctors believe that most cases of carpal tunnel syndrome are the result of a combination of “risk factors”. These are variables which, alone, contributes to developing this disorder. When combined, they very likely increase the probability of getting carpal tunnel syndrome.

obese couple

Primary Risk Factors

For decades, doctors have known about several factors that are common to patients with carpal tunnel syndrome. While these factors may not be a direct “cause” of the disorder, they could increase your risk of getting it. Common to all of these risk factors is that each has the potential of increasing irritation and swelling inside the carpal tunnel space. That means increasing the chances of compressing the median nerve.

• Sex

Females are many times more likely to get carpal tunnel syndrome compared to males. Some believe this is because the carpal tunnel space is relatively smaller in women. Others believe the reason is due to how flexor tendons respond to hormones. Perhaps it’s a combination of reasons.

• Wrist Anatomy

Under normal conditions, the body is in perfect alignment and balance. It’s how a normal person is born and develops. But incidences occur in life where that balance is disturbed. When the normal configuration of the wrist anatomy is disturbed, carpal tunnel can result.


Wrist sprain, fracture or dislocation can change the anatomical alignments inside the carpal tunnel space. Also, arthritis can change the shape of the wrist bones. These imbalances can result in extra pressure of the median nerve.



Finally, some people naturally have a small body frame. Studies show that those people have a higher likelihood of getting carpal tunnel syndrome.

• Neuropathy-Causing Disorders

Some conditions and chronic illnesses are known to causing nerve damage. These include diabetes, alcoholism, hypothyroidism, and Lyme disease. These can risk direct damage to the median nerve.

• Inflammatory Disorders

Certain disorders are known to inflammation and cause swelling. These include allergic reaction, rheumatoid arthritis, autoimmune conditions, gout, and infections. When the swelling occurs in and aro0und the wrist joint, the median nerve is at risk for being compressed.

• Drugs

Certain prescription medicines are known to be associated with carpal tunnel syndrome. They include anastrozole, exemestane, and letrozole (for treating breast cancer), disphosphonates (for treating osteoporosis), some oral anticoagulants, and some antiretrovirals.

• Obesity

Studies show that being obese puts you at risk for getting carpal tunnel syndrome. The reason is unclear.

pregnant woman reclining

• Changes In Body Fluids

Fluid retention may increase the pressure within the carpal tunnel. That pressure can irritate the median nerve. This is a common problem during menopause and pregnancy. If you get carpal tunnel syndrome during pregnancy there’s a high probability that it will resolve after childbirth.

• Various Medical Disorders

Various disorders are known to be associated with carpal tunnel syndrome. They include ATTR-CM, kidney failure, thyroid disorders, and lymphedema. 

• Workplace

It’s important to note that no workplace factor has ever been directly linked with causing carpal tunnel syndrome. However, for decades, the association between certain occupations and the presence of carpal tunnel syndrome has been strongly established.



There are specific, harmful ways we can use our hands. These harmful activities are common to many occupations.

1. Vibrating Tool Use

Using vibrating tools is especially harmful because it can cause carpal tunnel syndrome in addition to Hand Arm Vibration Syndrome. Those most at risk are construction workers, masons, flooring technicians, carpenters, landscapers, polishers, and cleaners.

2. Constant Grip-And-Release

Certain occupations have this activity in common. They include hair stylists, cashiers, auto mechanics, masons, gardeners, and carpenters.

using garden shears

3. Prolonged Gripping

This harmful activity is common to landscapers, cyclists, tennis players, golfers, and truckers. Truckers and long distance drivers are especially vulnerable because their hands are often raised or extended while gripping. Also, the steering wheel vibrates, which adds to the risk.

4. Rapid & Repetitive Movements

The most commonly cited example is computer (keyboard and mouse) use. Graphic designers, secretaries, clerks, and anybody on a computer for more than 6 hours per day is at risk. However, gamers, pianists, and guitar players are also in this category.

5. Prolonged Pinching

Those who write with a pen or pencil, use a stylus or tweezer or solder small parts are at risk. So are those sorting or making small parts on an assembly line. Carpal tunnel also disproportionately affects sewers, knitters, and crafters.

6. Maintaining A Bent (Extended) Hand

If you do extensive weight training, push-ups, furniture moving, cabinet installation, farming, truck driving, then you are at high risk for getting carpal tunnel syndrome. 

7. Working In The Cold

Working with cold hands increases you chances of seeing carpal tunnel symptoms. Those at high risk are meat packers, butchers, linemen, fishermen, energy workers, mineral extractors, and forklift operators. 

good and bad posture

Carpal Tunnel Prevention

• Avoidance

The best way to prevent carpal tunnel syndrome from happening is to avoid the harmful activity to begin with. Unfortunately, most people cannot just stop what they’re doing on the job. That means they have to use one of the other recommendations below. But if your hobby is causing hand or finger stress, you should curtail or it immediately. Do you have to golf or kayak every day or all day? Can you crochet or knit for fewer hours? Can you discontinue push-ups, curls or pull-ups, or else find ways to un-stress your wrists?

• Reduce The Workplace Impact

You can lessen the impact of your workplace’s harmful hand activity – usually with a just a simple modification. For example, use ergonomic tools like a keyboard or mouse. Switch hands to perform an activity. Change the angle of your wrist. Soften or relax your grip, even if you have to wear gloves. If you have to hit keys on a keyboard or cash register, hit the keys more softly.

• Maintain Good Posture

Many people sit at a desk, phone or computer all day long. And most people have poor sitting posture. Hunching or slouching are the problems. These postures exert tremendous forces on the shoulders. And those forces transmit to the hands. These postures usually result from a poorly placed keyboard, mouse, screen or chair.


While at your desk and typing, your hands must be in the neutral (straight) position as much as possible. Bent wrists are very bad! B sure the keyboard is roughly at the height of your elbows or slightly lower. Adjust your screed so your head does not have to move up or down too much. Sit with your back straight and feet firmly on the floor. Use an ergonomic mouse.

• Rest

Rest doesn’t mean going to sleep. It means to rest your hands periodically in order to minimize the impact of the stressful activity. A good general rule is to rest for 1-2 minutes for every half hour of stressful finger/hand activity. Best practice is to perform stretching exercises (see next) during that rest period.

carpal tunnel stretches

• Stretching Exercises

Stretching exercises have long been claimed to help lessen the probability of getting carpal tunnel syndrome. That’s because stretching lubricates tendons, and breaks up adhesions which can cause inflammation. There are 4 core stretching exercises which are quick and easy to do, especially during your rest breaks (see above). Best practice is to do the stretches every 30-60 minutes of stressful hand activity.

• Warm Hands

Keeping your hands warm is essential to good hand health. And even though you may not get carpal tunnel syndrome in a cold environment, you invite finger stiffness and pain. Try wearing thermal gloves. If needed, fingerless gloves can offer dexterity while warming your hand and wrist.

Summary

Carpal tunnel syndrome is a common hand disorder afflicting millions. Common symptoms include hand and finger numbness, pain, tingling, burning, and weakness. At its core, carpal tunnel syndrome is a dysfunction of your median nerve. Specifically, the nerve becomes crushed by surrounding tissues because they swell and expand, for one of several reasons. That crushing is the underlying reason for all the symptoms of carpal tunnel syndrome. Sometimes the swelling is due to medical conditions like pregnancy or diabetes. Other times it is due to swollen flexor tendons. That can occur if you engage in harmful hand activities such as constant gripping or rapid and repetitive finger/hand movement. You can avoid this disorder if you take one or more precautions such as avoiding the harmful activity, wearing gloves, doing stretches, and adjusting your sitting posture.

FAQs

• Can symptoms of carpal tunnel disappear without treatment?

Sometimes symptoms can resolve on their own, particularly in the Mild stage of the disorder. But in Moderate or Severe stages, spontaneous resolution is rarer.


• How can you tell if it’s carpal tunnel versus something else?

You can perform specific tests at home to determine if you have carpal tunnel syndrome. Or sles you can visit you doctor for a complete diagnosis.


• What if I can’t quit my job, yet have to perform the same harmful hand activities?

This is always a tough call. You will have to decide on what’s more important; your occupation or your comfort. If you cannot eliminate the symptoms with any remedy (including surgery) then performing the same tasks will only worsen you condition.

About

Biography: Dr. Z - CarpalRx Medical Director & author

Dr. Maik Zannakis (Dr. Z) 

Medical Director at the CarpalRx


Dr. Z is an acclaimed medical scientist renowned for his expertise in carpal tunnel syndrome and soft tissue disorders. With over 40 years of experience, he is credited with hundreds of medical journal publications and hundreds more web articles about carpal tunnel syndrome. After inventing the CarpalRx, Dr. Z became the go-to expert for carpal tunnel syndrome and wrist tendonitis. His opinions, inventions, and personalized care have distinguished Dr. Z as a trusted leader in this growing field. Read full Bio


Email: dr.z@carplarx.com

Phone: 800-450-6118