The pattern is the same almost every week. The hand goes numb at night, usually the thumb and the first two fingers, and you shake it out to get back to sleep. The forearm aches by lunch. Somebody says carpal tunnel, you buy a brace at the pharmacy, and the brace does nothing. Then I ask where your hand sits all day, on a mouse, palm down, eight hours, and I ask you to turn your head and breathe in, and the numbness shows up in ten seconds. The wrist was never the problem. The nerve was being squeezed in the neck and again in the forearm, and the wrist is just where you felt it. I am a Licensed Neuromuscular Therapist in Greenville and I see this exact picture most weeks. This article walks you through the muscles that pinch the nerves to your hand, what each one feels like, why the brace and the surgery sometimes do not hold, and what I actually do about it.
The Nerve Is Three Feet Long. The Wrist Is One Inch Of It.
Three nerves run from your neck to your fingertips. The median nerve feeds the thumb, the index finger, the middle finger, and half the ring finger. The ulnar nerve feeds the pinky and the other half of the ring finger. The radial nerve feeds the back of the hand and the web of the thumb. Every one of them leaves the spine between the neck vertebrae, threads between two neck muscles, dives under the collarbone and a chest muscle, runs past the elbow, and passes through the forearm muscles before it ever reaches the wrist. That is five places a tight muscle can lean on it. The wrist is the last stop, and the carpal tunnel gets blamed because it is the most famous. In my experience it is the real culprit far less often than the brace sales would suggest. Which fingers go numb tells me which nerve. Where it goes numb, and what makes it worse, tells me which muscle.
Scalenes: The Neck Muscle That Numbs Your Whole Hand At Night
Three small muscles on the side of your neck run from the vertebrae down to the top two ribs. The nerves for your entire arm, bundled together, pass right between them. When the scalenes tighten, from forward head posture, from carrying a bag on one shoulder, from breathing high in your chest when you are stressed, they close that gap, and the whole hand pays. The pattern is unmistakable once you know it: aching into the shoulder blade, down the front or the back of the arm, a hand that falls asleep while you sleep, fingers that tingle when you hold the phone up or reach overhead. Often it is not one nerve pattern but all of them at once, which is the giveaway that the problem is above the collarbone and not at the wrist. People hear numb fingers and think disc, and sometimes it is. A disc has a pattern and the scalenes have a different one, and I check both. When it is the scalenes, I release them and the breathing pattern that keeps them tight, and the night numbness usually fades over a few days as the nerve calms down. I wrote more about these muscles in my article on the muscle behind each kind of neck pain.
Pectoralis Minor: The Chest Muscle Under Your Collarbone
Just below the collarbone, under the big chest muscle, sits a small one called the pectoralis minor. It runs from the ribs up to the point of the shoulder blade, and the same nerve bundle that squeezed between the scalenes now passes under it. Rounded shoulders shorten it. So does hours of typing, holding a phone, driving, and any job with the arms out in front. When it locks, you get numbness and heaviness in the arm when you sleep on that side or put your arm over your head, a hand that goes cold and pale, and an ache in the front of the shoulder that gets called a rotator cuff problem. Stretching it in a doorway irritates it more often than it helps, because the knot does not stretch, the fibers around it do. I release it from its attachment on the ribs up to the shoulder blade, slowly, and then I give you the one shoulder position change that stops it from shortening again.
Pronator Teres: The Forearm Muscle That Fakes Carpal Tunnel
This is the one that fools everybody. The pronator teres is the muscle in the top of your forearm, just below the inside of the elbow, that turns your palm down. The median nerve runs straight through it. Every hour on a mouse, every screwdriver, every wrench, every steering wheel, every dumbbell curl with the palm turned in shortens this muscle, and when it locks down it pinches the same nerve that the carpal tunnel pinches, producing the same numb thumb, index finger, and middle finger. The difference is where it hurts: carpal tunnel hurts at the wrist, pronator hurts in the upper forearm and gets worse when you turn your palm down against resistance. There is one more clue I always check. Carpal tunnel spares the skin of the palm, because that branch of the nerve splits off before the tunnel. Pronator does not. If the heel of your palm is numb too, the problem is above the wrist. The medical literature is blunt that pronator syndrome is routinely mislabeled as carpal tunnel, and I have had more than one patient who had the wrist surgery and still had the numb fingers, because the muscle that was actually squeezing the nerve was never touched. I find the knot in the pronator with your palm turned up, release it, and work the nerve path above and below it. The tingling usually changes before you leave the table.
The Forearm Flexors And Extensors: Grip, Wrist Pain, And The Elbow
Turn your palm up and squeeze your fist. The muscles that bunch up in your forearm are the flexors, and their tendons run through the carpal tunnel itself. Turn your palm down and lift your fingers. Those are the extensors, and they attach at the outside of the elbow where tennis elbow lives. Both groups are loaded all day by gripping, typing, texting, lifting, and holding a phone. Trigger points in the flexors refer pain into the wrist and the palm and make the fingers feel thick and clumsy in the morning. Trigger points in the extensors refer pain into the back of the wrist and the back of the hand, weaken your grip, and give you the elbow ache that gets called tennis elbow even if you have never held a racket. Tight flexor tendons also take up room in the carpal tunnel, so even when the wrist is the site of the pinch, the muscles upstream are usually the reason. I wrote about these in detail in my articles on carpal tunnel and wrist pain and elbow pain. In a session I work both groups from the elbow to the wrist, find the knots that reproduce your pain, and hold them until they let go.
A hand that is numb at the fingers is almost never pinched only at the wrist. Five muscles between your neck and your hand get the first vote.
Double Crush: Why The Wrist Surgery Sometimes Does Not Hold
Here is the part that ties this together. A nerve that is already irritated in the neck becomes far more sensitive to a second squeeze further down, at the chest, the forearm, or the wrist. The two together produce symptoms that neither would produce alone. The researchers who first described this called it double crush, and in their original series the large majority of patients with a nerve pinched at the wrist or the elbow also had signs of it being irritated at the neck. This is why some people have the carpal tunnel released and feel better for a few months, then the numbness comes back. The wrist was one squeeze. The scalenes or the pronator were the other, and they were never treated. When a patient tells me they already had the surgery and still have the symptoms, I do not start at the wrist. I start at the neck and work my way down, and the second pinch is almost always in one of the muscles above.
Arthritis In The Hands: I Cannot Change The Joint, But I Can Change What Is Pulling On It
I treat a lot of hands with arthritis, and I will be honest about what I can and cannot do. I cannot rebuild cartilage. What I can do is take the tension off the joint, and that is a bigger share of the pain than most people think. When a joint is sore, the muscles around it guard. They clamp down to protect it, around the clock, and that constant pull compresses the joint harder, limits the motion more, and adds its own ache on top of the arthritis. In the hand that means the forearm flexors and extensors, the small muscles in the palm and the web of the thumb, and the muscle at the base of the thumb that gets hammered by every pinch, grip, and phone swipe. Thumb base arthritis in particular comes with a thumb muscle locked so hard it feels like bone. When I release those muscles, the joint decompresses, the fingers open further, the morning stiffness eases, and the grip comes back some. Patients with arthritis who come in regularly tell me their hands feel ten years younger for a couple of weeks after a session. That is not the arthritis going away. That is the muscles finally letting go of the joint. I also work the forearm and the nerve path above it, because an arthritic hand is almost always also a tight forearm, and a tight forearm is often a numb hand waiting to happen.
Why The Brace, The Ergonomic Mouse, And The Stretches Do Not Hold
You have tried them, so I will be plain. A wrist brace at night keeps the wrist straight, which helps if the wrist is the problem and does nothing if the pinch is in the neck or the forearm, which is most of the time. An ergonomic mouse or keyboard changes the angle of the load; it does not remove the load, and the pronator and the flexors are still working all day. Stretching a forearm that has an active trigger point in it usually irritates it, because the knot does not lengthen, the healthy fibers around it do, and the knot pulls harder when you let go. I wrote about why stretching alone does not fix tight muscles and it applies to the arm. Ice and heat change how it feels for twenty minutes. None of these find the muscle. Finding the muscle is the whole job.
When It Is Not Muscle
Most hand numbness and forearm pain I see is muscular and it gets better. Some is not, and I will tell you if I think yours is. Get it looked at and imaged first if you have weakness in the hand that is getting worse, visible wasting of the muscle at the base of the thumb or between the fingers, numbness that started with a fall or a crash, numbness in both hands along with balance or walking problems, or numbness that follows a glove or stocking pattern, which can point to diabetes or another nerve condition. Pain or numbness in the left arm with chest pressure, sweating, or shortness of breath is an emergency and you call 911, not me. Everything else in this article is for my table.
What A Visit Looks Like For Hand Numbness And Forearm Pain
Your first visit is a full sixty minutes, one on one with me, and the first part of it is me finding the pinch. I check which fingers are numb, whether the palm is included, what your head and your arm positions do to it, and I press on each muscle in the chain while you tell me what you feel. The muscle that reproduces your exact symptom is the one we treat. Then I work: scalenes with your breathing, pectoralis minor under the collarbone, pronator teres with the palm up, the flexors and extensors from the elbow to the wrist, and the small muscles of the hand if arthritis is part of your story. Pressure is firm and specific, never a fight. Most people feel the tingling change and the grip loosen before they get off the table. I send you home with the two or three things that are loading the chain, usually something about your mouse hand, your phone, your sleep position, or your breathing, and we plan from there. A fresh case is often two or three visits. A hand that has been numb for a year, or one that already had surgery, takes a few more. I will tell you which you are after the first one.
Greenville, Your Hands Are Telling On Your Job
I can usually guess the job from the forearm. The downtown office crowd and the people working from home in Simpsonville and Greer come in with a locked pronator from the mouse and scalenes from the laptop. The mechanics, the plant workers off 85, and the trades come in with flexors and extensors like rope from gripping all day. The nurses come in with both. The retirees from Travelers Rest and Taylors come in with arthritic hands and forearms they did not know were tight. And the people who sleep on their side with the arm under the pillow bring the pectoralis minor with them. If you are reading this with your hand going numb on the phone, you already know which muscle is working right now. First visit is sixty minutes, no referral needed, and you can book it online in about thirty seconds. Leave the brace at home.
