Hello dear, The bruise & wound needs to be cleaned properly with regular dressing & a course of prophylactic antibiotics to prevent secondary infection. The swelling in the elbow after fall 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 analgesics preparations (like paracetamol/ ibuprofen)+ serratiopeptidase, ice compression & adequate rest. If it still persists or there are any other associated symptoms like fever, loss of sensation, etc...then it will be better to consult your Doctor. Under such circumstances, a proper clinical+ radiological evaluation (X ray of elbow joint) will be needed to rule out any bursitis or fracture. Till then, he should maintain adequate hydration & nutrition status. There is no need to worry, he will be fine. Wishing your friend a good health. Take care.