hi, i have developed a ucler on the sinus tract after completing the treatment of tb in lymph node for 09 months. the ulcer is of light red base with dots of pus near the edge. it leaked out pus for 3 days and now stopped. i am on same medicne of 2 drug now and using sodium fuisdate on the ucler. its size of a chickpea. please advise how long does this take to heal or any surgery is required.