Hello dear, 1. The swelling/ bump formation after injury is due to accumulation of fluid & blood and it is called Hematoma. The blood cells accumulated are eventually broken down and absorbed in the body. But this is a slow process & takes times to disappear completely. Till that time, symptomatic relief is obtained by ice compression, adequate rest & analgesic preparation like Diclofenac+ Serratiopeptidase. 2. The sensation of numbness can be attributed to compression of nerve or blood vessels due to the Hematoma. Investigations like Doppler scan of lower limb blood vessels & nerve conduction studies will be helpful. Symptomatic relief can be obtained by intake of nervigenic agents (like Vitamin B6, Vitamin B 12, Folic acid) as well as multivitamin & multimineral supplements including iron, calcium & Vitamin D needs to be added in your diet. Physiotherapy exercise will also be helpful. If symptoms still persist, kindly consult an Orthopedician for proper clinical examination. X ray of the affected leg will be helpful to rule out any fracture or other pathological causes. Wishing you a Good Health. Take care.