Patient: I am 62 years old, suffering from severe rheumatoid disease and have difficulty walking. When I was soaking my feet in a decoction of Chinese herbs because of swelling and pain in my feet and ankles, I accidentally cut off the soft skin on my right foot and caused an ulcer, forming a hole about 5 mm deep and 10 mm in diameter, which could be touched by the bone. After three months of treatment in the hospital, the wound gradually shrank to the size of a green pea, but after another three months of treatment, the wound did not heal. What should I do if the wound does not heal for a long time? Doctor: Your wound did not heal after three months of hospital treatment, which is related to your severe rheumatoid disease or other diseases in your body. Poor blood circulation, taking some hormonal drugs and unhygienic skin cleaning can affect the healing of the wound. It is advisable to go to the dermatology department of the local regular hospital to do bacterial culture and drug sensitivity test to see if you are allergic to any kind of bacterial infection or drug.