<s>[INST] i had a fall down 5 stairs,i had a bruise from my bum crack to the outside of my body and about 7 inches long.After the bruising started going away i have been left with a massive lump and really painful kidney on the same side.Could i have done alot of damage to my kidney ?? [/INST] Hi,Dear,Welcome with your query to HCM.Studied your query in full depth of its details.Reviewed it in context of your health concerns.Based On the facts, You mostly seem to suffer from-Post-fall Hematoma on buttocks and Loin(kidney) region.The pain and lump in Loin-kidney and buttocks -needs to be assessed for the size and resolving status.Remedy-Do clinical assessment of Lump and the tissues related to it by a Surgeon.As you don't have any hematuria,You seem to have only Muscle injury of the loin region.This would resolve over next 2-4 weeks depending on the damage to the muscles from the fall.Tab Motrin- 1 x 3 times a day x 10 days Tab Cipllox-5oo mg x 1 x 2 times a day x 10 days -as the lump of hematoma is huge - to control any superadded infectionTab Chymoral Forte-1 x 3 times a day x 10 days Tab Zincovit 1 x 10 days timeVoltaren gel locally over the painful areas on buttocks and Loin area.After SOS/ or / 10 days time-get USG/ CT evaluation of the big lumps you have.Plan for-Wide Bore -Aseptic Needle Aspiration with Compression Dressings x 5 days time.IF relieved ok.If  recurs / or if the size is increasing at any stage-of progress-Open drainage and evacuation/debridement of Clot and Wounded Tissue and bleeding Vessels is a MUST.this needs indoor management in Critical CAre department.Other causes of bony / ligamental/vascular damage need to be ruled out and treated if present accordingly from Second opinion from  Surgeon and Ortho-Surgeon if needed.Hope that ,This reply would help you to plan further treatment soon with your treating doctors.Best of Luck and early recovery.Welcome any further query in this regard,which would be replied in next session.Good Day!!Dr.Savaskar M.N.Senior Surgical Specialist </s>