What should you know about hand knuckle swelling?

A knuckle may puff up after a direct blow, sprain, repetitive gripping, or a small skin injury. Inflammation within the joint can cause tenderness, warmth, stiffness, and difficulty making a fist. Several knuckles that remain swollen or become stiff may need assessment for an inflammatory condition such as rheumatoid arthritis. Swelling after a wrist or hand injury may occur alongside a distal radius fracture, particularly when movement is painful.

Compare both hands and note whether the swelling is over the knuckle, between the joints, or across the whole hand. Look for bruising, redness, broken skin, numbness, and changes in grip.

Remove rings before swelling increases. Rest from forceful gripping, keep the hand elevated, and use a wrapped cool pack for short periods during the early phase after an injury. Gentle finger movement within comfort can help prevent stiffness, but do not force a painful joint or try to straighten a deformed finger.

Do not massage a hot, red, or acutely painful knuckle until infection or crystal inflammation has been considered. Arrange an appointment when swelling persists, recurs, affects several knuckles, or limits daily tasks.

Seek urgent care after a significant injury if the knuckle is deformed, the finger points abnormally, or you cannot bend or straighten it. Get prompt help for rapidly increasing swelling, severe pain, a hot red joint with fever, pus, or red streaking. A cold, pale, blue, numb, or suddenly weak hand requires emergency assessment.

Is the swelling coming from the joint, tendon, skin, or a bone injury? Do I need an X-ray or other tests? Which movements should I practise, and how should I protect the hand while it heals?