Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it seems that bump and bruise on the shin due to hitting of the leg on the shin is due to traumatic injury to the soft tissues of the shin due to injury and it has led to trauma to small superficial blood vessels leading to accumulation of blood into the soft tissues causing bruising and formation of a Hematoma.. Hematoma is a harmless tumor like mass formed due to spillage of blood from ruptured blood vessels leading to accumulation of blood into the soft tissues forming a lump.. The lump seems to be due to infection and not hematoma formation.. At times the hematoma gets localized and encapsulated and forms a firm hard lump that can take a long time, say a few months to resolve, but it generally tend to resolve itself.. You should do alternate warm and cool compresses over the lump.. Apply Heparin gel as it help in faster disintegration of the hematoma.. If there is pain you can take anti inflammatory painkiller like Ibuprofen and apply numbing gel containing Lignocaine over the lump.. You can also elevate your leg while lying down.. You need not to worry as you are able to walk well and it is indicating that you do not have any serious tissue tears or bony fractures and in case if the condition worsen then you can consult your orthopedician and get an x ray done.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.