Shoulder hurts when I lift my arm
You lift your arm and a sharp pain stops you. Reaching a high shelf, putting on a coat, or washing your hair can be the worst of it. With your arm down at your side, the pain often drops to a dull ache.
Most people feel it in a band on the outer shoulder, near the top of the arm. The pain often bites most in the middle of the lift, from about shoulder height up. Past that point, it can ease again.
A very common cause is a swollen bursa. A bursa is a small fluid sac that cushions the joint. When it puffs up, the space under the shoulder bone gets tight, so lifting pinches it.
When to see someone
Call 911 or go to the emergency room if shoulder pain comes with chest pain, sweating, short breath, or jaw pain. That can be a heart problem, not a shoulder problem.
Go the same day to urgent care or the emergency room if your shoulder is hot, red, and swollen with a fever. Go the same day if the pain started right after a fall or crash, or if the shoulder looks out of shape.
See a doctor within a few days if your arm is weak, drops when you try to hold it out, or cannot lift at all. Do the same if you heard a pop when it started.
Book a visit if pain runs past your elbow, or if your hand feels numb or tingly. Book a visit if pain wakes you most nights, or if it has lasted more than two to three weeks with no change.
Go sooner if you have diabetes, cancer, or a weak immune system. Those raise the odds of a cause that needs faster care.
Why it happens
The top of your arm bone sits under a bony roof. Tendons and a bursa slide through that narrow gap each time you raise your arm. If the bursa or a tendon swells, the gap gets too tight.
Swelling often starts after heavy use. Painting a ceiling, lifting boxes, throwing, or a long day of overhead work can set it off. Sleeping on that side presses the sore spot all night, so mornings feel worse.
Age and old shoulder injuries add to it. Tendons get less springy over time and fray a bit. A rounded, slouched posture also lowers the bony roof and shrinks the gap.
What else it could be
Bursitis is not the only cause, and the fix is different for each one. Here is how to tell them apart at home.
Rotator cuff tendon pain feels much like bursitis. The tell is weakness: your arm tires fast, and you may not be able to hold it out to the side. A sudden pop while lifting, then weakness, points to a tear and needs a doctor.
Frozen shoulder is stiff, not just sore. Someone else cannot lift your arm past a point either, even when you relax. It builds slowly over weeks and is more common after age 40 and with diabetes.
AC joint trouble sits right on top of the shoulder, at the small bump where the collarbone ends. It hurts most when you reach across your body or lift very high. Pressing that bump is sore.
A pinched nerve in the neck sends pain down the arm past the elbow. You may feel pins and needles or numbness in the hand. Turning your head changes the pain, while lifting the arm may not.
Calcium buildup in a tendon causes sudden, severe pain, often at rest or at night. It can feel far worse than normal bursitis. An X-ray shows it.
Arthritis in the shoulder joint feels deep, aches most days, and often grinds or clicks. It comes on over years. Heart or gallbladder problems can also refer pain to the shoulder, but that pain does not change when you move your arm.
How to read the grades below
The options below come from our page on Bursitis. Each one carries two labels.
The first label is the evidence grade. A means strong trials in people, B means smaller or mixed studies, and C means early or limited findings. D means lab work only, and “insufficient” means the research cannot settle it yet.
The second label is the traditional tier. T3 means long use in more than one tradition, T2 means long use in one, and T1 means known use. T0 means no such record.
These grades come from research on Bursitis, the parent Health Topic, not on shoulder hurts when i lift my arm.
A grade tells you how strong the research is, not how well something will work for you. Talk to a doctor or pharmacist before you start anything, above all if you take other medicines.
What to try first
Start by changing the moves that hurt. Skip overhead reaching for a week or two. Keep using the arm below shoulder height so it does not stiffen up.
Do not sleep on that side. A pillow under the sore arm can help. Ice the outer shoulder for 15 minutes, a few times a day.
Exercise (evidence grade A, traditional tier T3) has the strongest proof here. Begin with gentle swings and slow reaches. Add light band work as pain drops, and ask a physical therapist to check your form.
Capsaicin (topical) (evidence grade A, traditional tier T0) is a chili pepper cream you rub on. It stings at first, and that fades with use. Wash your hands after, and keep it off your eyes.
Three pills carry grade A. They are Boswellia Serrata (evidence grade A, traditional tier T3), Curcumin (evidence grade A, traditional tier T0), and Fish oil (evidence grade A, traditional tier T0). Boswellia is a tree resin with long folk use, while curcumin and fish oil come from newer study, not old tradition.
Four more have grade B, which means the proof is thinner. They are Bromelain (evidence grade B, traditional tier T0), Methylsulfonylmethane (MSM) (evidence grade B, traditional tier T0), Arnica Montana (evidence grade B, traditional tier T3), and Willow Bark (evidence grade B, traditional tier T3).
Arnica is a rub with long folk use, and willow bark is an old plant remedy that works a bit like aspirin.
Be careful with a few of these. Willow Bark, Fish oil, and Bromelain can thin the blood, so skip them if you take blood thinners or have surgery coming up. Talk to your doctor or pharmacist before you start any of them.
How long it takes
Give any change two weeks before you judge it. Rest and gentle movement often help a swollen bursa in two to six weeks. Some people take longer, and that is common.
Exercise works slowly. Most people feel a small change in two to three weeks and more by six to eight weeks. Doing it most days matters more than doing a lot at once.
Rubs like capsaicin may take a week of daily use to do much. Pills often need two to four weeks. Frozen shoulder and cuff tears run on a longer clock, often many months, and need a real diagnosis first.
If nothing has changed after two weeks, stop guessing and get it looked at.
