Painful lump in the calf under the skin: what to know

A lump that appeared after a knock may be a muscle contusion with bruising and tenderness. After sudden force or overstretching, a muscle strain can create local pain, tightness and difficulty pushing off. Pain lower down near the heel may involve Achilles tendinitis rather than a skin-level mass. The feel, mobility, colour, temperature and timing of the lump matter. A calf that becomes swollen, warm or painful without a clear injury needs prompt medical review because circulation problems can mimic a muscular injury.

If there was a minor injury, stop the provoking activity, protect the area and use comfortable movement without forcing the calf. Elevate the leg when resting if that feels relieving, and avoid deep massage over a fresh lump. Do not repeatedly press or attempt to drain it. Note its size, colour, tenderness and whether the whole calf is changing. A clinician can decide whether examination, imaging or supervised rehabilitation is appropriate. Sports massage should wait until an unexplained or newly swollen lump has been assessed.

Get urgent medical help for sudden one-sided calf swelling, warmth, redness, rapidly increasing pain, or a lump without an obvious injury. Breathlessness, chest pain, faintness or coughing blood with calf symptoms is an emergency. Prompt review is also needed if you cannot walk, felt a snap, have extensive bruising, fever, numbness or a cold foot.

Could this be a bruise, muscle strain, tendon problem or another type of lump? Do I need a circulation check or imaging? What activity and pain relief are safe? When can massage or strengthening begin?