<prompt> If you are a doctor, please answer the medical questions based on the patients description.My Father has fungal infection in left leg , we have consulted many doctors in bhubaneswar . due to infection the skin turns black and thick . He is being treated for more than 5 yrs . Can u suggest some surgery so that the skin will be normal .  <response>: HiT hank you for asking ChatDoctorI have gone through your query. A culture of skin scrapping should be done to rule out the causative agentfungus. In case of suspicion of lichen plans a punched biopsy also should be done. A consultation with a dermatologist will be helpful to diagnose the condition properly and to treat it. If it is fungal infection then topical antifungal agents along with oral tablets of antifungals like terminating or fluconazole will be needed for long term to eradicate the infection. In case of lichen plans, moderately potent topical steroids will be helpful also. Hope this may help you. Let me know if anything is not clear. Thanks. 