Pain at the base of the thumb on the palm side

The thumb base carries force during opening jars, using tools, typing, lifting, and pinching. Irritated tendons can hurt when the thumb moves or when you press along their course. De Quervain's tenosynovitis usually affects the thumb-side wrist, but nearby pain can be felt toward the thumb base. A joint problem may cause aching, stiffness, or reduced grip, while a sprain is more likely after a clear bend or impact. Clicking, locking, tingling, or visible swelling adds useful information.

Assessment may include comparing both hands, checking thumb range, grip, sensation, tenderness, and ligament stability. An injury with marked weakness may need imaging or specialist review.

Reduce repeated pinching, forceful gripping, and prolonged thumb scrolling while the pain is active. Keep the thumb moving gently within a comfortable range rather than holding it rigid all day. A thumb-supporting splint may help during aggravating tasks; it should not cause numbness, colour change, or pressure sores. Cold wrapped in cloth can ease soreness after use. Once pain settles, gradual strengthening guided by a physiotherapist can rebuild tolerance.

Seek prompt care after a fall, crush injury, deformity, sudden loss of movement, or inability to grip. Arrange review for persistent swelling, warmth, numbness, locking, or pain that does not improve after reducing the trigger. A thumb that becomes pale, blue, or cold needs urgent attention.

Ask whether the pain is coming from a tendon, joint, ligament, or nerve; whether a splint is suitable; which tasks to modify; and how to progress exercises safely.