Pain Inside Forearm: Common Causes and When to Worry

Pain inside the forearm, on the soft palm side between your elbow and your wrist, is common, and it usually has an ordinary cause. Most often the muscles that bend your wrist and curl your fingers are simply tired. Sometimes a nerve is irritated. This page helps you work out which one sounds like yours, and which signs mean you should not wait.

First, the signs that need a doctor

Please read these before anything else.

• Call emergency services if you have arm or forearm pain, in either arm though often the left, together with chest pain, breathlessness, sweating or feeling sick. Do not wait to see if it passes. The same goes for sudden weakness or numbness in one arm with a drooping face or slurred speech.
• Get care the same day if the forearm is swollen, warm, red and tender. That can mean a blood clot or an infection.
• Get care the same day after a fall if there is swelling, bruising or a change in the shape of the arm.
• See a doctor soon for numbness or weakness in the hand, or if you keep dropping things.

If none of that fits, read on. Most forearm aches are not serious.

What sits on the palm side of the forearm

The palm side holds a crowd of muscles. They bend the wrist and close the fingers and thumb. Their tendons run down into the hand, and many of them start near the inner bump of the elbow. Two nerves also pass through: the ulnar nerve on the little finger side, and the median nerve closer to the middle. Because so much is packed into a narrow space, an ache here can come from several places.

The likely sources of pain inside the forearm

Tired finger and wrist flexors. This is the usual one. A dull, heavy ache along the inside of the forearm, worse after a day of typing, a long phone session, gardening or carrying shopping. You can often find a tender band when you press gently. It tends to ease with rest and come back with the same job.

Golfer's elbow, spreading down. The tendon at the inner elbow bump becomes sore from repeated gripping and lifting. The ache can run down the inside of the forearm like a string. Our guide to pain on the inside of the elbow covers that spot in detail, so this page stays below it.

An irritated nerve. Pins and needles, burning or numbness suggest a nerve rather than a muscle. Tingling in the little finger and the half of the ring finger next to it points to the ulnar nerve, the one behind the funny bone. Tingling in the thumb, index, middle and the other half of the ring finger points to the median nerve, which passes through the wrist at the carpal tunnel. Carpal tunnel syndrome has an estimated incidence of 1% to 5% in the general population (StatPearls, 2023), so it is a real possibility but far from the only one. Our page on carpal tunnel treatment goes further.

A bruise or strain. If you knocked the arm, lifted something heavy, or twisted suddenly, a bruise or pulled muscle is a simple explanation. Soreness that begins that day and fades over days to weeks fits this pattern.

Which sounds like yours?

Ask yourself three questions.

1. Where is it? A sore, pressable band points to muscle. A deep ache near the inner elbow points to the tendon.
2. Is there tingling? If yes, note which fingers. That tells a clinician a great deal.
3. What makes it worse? Gripping and typing suggest muscle or tendon. Keeping the elbow bent for a long time suggests the ulnar nerve. Bending the wrist for long periods suggests the median nerve.

Why the forearm ends up doing so much

Think about how rarely your hand is truly empty. Mouse, phone, steering wheel, pan, bag handle. Each one asks the finger flexors to stay switched on. And most of us hold harder than the object needs. Add shoulders that creep forward at a desk, and the small forearm muscles end up doing work the whole arm should share. Our Feldypedia entry on repetitive strain from keyboard use explains how this builds up.

What tends to help

Notice your grip. Pick up your phone with half your usual force. Does it still stay in your hand? Usually it does. Try this with a mug or a pen too.

Vary the job. Swap hands, stand up between emails, and spread heavy carrying across both arms.

Let the elbow soften. A bag carried with a slightly bent elbow, close to the body, asks less of the forearm than a straight arm hanging at the end of a handle.

Rest the forearm on something soft. A hard desk edge pressing the palm side can irritate both muscle and nerve.

Be patient. Overworked tissue settles on its own schedule. Warmth or a cool pack for comfort is fine, with a cloth between it and your skin.

Movement awareness, as taught in the Feldenkrais Method®, looks at the larger picture. It asks how your shoulder blade, ribs and breathing take part when you reach and grip. In a Feldenkrais® lesson you explore small, slow movements and notice where effort is not needed. Feldy offers this in short audio lessons, and our somatic exercises for beginners are a gentle first step. None of this replaces an examination, and it is not a treatment for any condition. Think of it as a way to learn what your arm is doing while it hurts.

When to see a doctor, in short

Come back to the list at the top if anything changes. Beyond those urgent signs, see a GP or physio if the pain has not eased after several weeks of lighter use, if it wakes you at night, or if tingling keeps returning. A nerve and a muscle ask for different care, and an examination sorts them out.

Find where to start

You do not have to guess what suits a tired arm. A short quiz can name a movement method that suits your body.

Wondering where to begin? Try the Movement Match quiz and see whether Feldenkrais, Tai Chi, Yoga or another method sounds right for your week.

Common Questions about pain inside the forearm (FAQ)

Can I keep using my arm while the inside of my forearm hurts?

For a mild ache, yes, with a lighter touch. Keep the arm in everyday use and cut back on whatever job makes it flare. Get checked first if a fall started it, if the forearm looks swollen, warm or red, or if the hand feels numb or weak.

How often should I do gentle forearm movement?

Little and often works better than one long go. Spend a minute or two on slow, easy arm and hand movement, a few times between tasks. Stay well inside comfort and carry nothing while you try it.

How long does pain inside the forearm take to settle?

A mild strain often eases within about two weeks once the arm has less to do. Pain from a tendon can hang around for months. If nothing has changed after several weeks, book a GP or physio visit.

How is muscle pain different from nerve pain in the forearm?

Muscle pain is a dull ache or tight band that you can press with a fingertip, and gripping makes it louder. Nerve pain brings tingling, burning or numbness, often running into the fingers. You can have both at once, and a clinician can tell which one leads.

What should I avoid when the inside of my forearm is sore?

For now, rest from strong gripping, carrying heavy bags by the handle, and long typing runs with no pause. Do not lean the forearm on a hard desk edge for hours. Skip jabbing a thumb deep into the sore spot, which can leave it more touchy.

How does gentle movement differ from physiotherapy for forearm pain?

A physio tests the muscles and nerves and may build a stepped plan of strengthening. Movement awareness asks a different question: how do your shoulder, trunk and hand share each task, so the forearm is not carrying it alone? The two answer different needs, and plenty of people use both.

When should I see a doctor about forearm pain?

Phone emergency services if arm pain, in either arm, comes with chest pain, breathlessness, sweating or sickness. Seek care the same day for a swollen, warm, red, tender forearm, or for pain after a fall with swelling or an odd shape. Book a doctor for numbness or weakness in the hand, or for pain still there after several weeks.