I fell down the stairs and my ankle is scratched and brusies there is a bumb underneath on eof the scratches. its sore to the touch what do i do?

Get it evaluated: If you had an injury it may be a fracture, sprain or an injured tendon. Get seen by a professional to determine the cause. You may need and x-ray or an MRI to identify the problem.

Bump Ankle: It sounds like there may be a hematoma or blood clot under the skin, but you should get it checked out. Try warm compresses to the area and make sure you look for signs of infections (warm, painful, red, draining).

When in Doubt: Check it out. A bump can be anything from ligament damage to fracture to hematoma and on and on. See podiatrist for x-rays at least.