The lesion described by you is something which may be troublesome.
I doubt the benign nature of the condition.
It may be anything like squamous cell carcinoma
, scar sarcoidosis
If it is infection, then also it does not seem to be simple bacterial infection.
The best answer will be given by a dermatologist
by looking the lesion. Some of the investigations may also be required like tissue biopsy
, culture-sensitivity testing etc.
Hope you will not put this matter on the back seat.
Dr. Ajit Singh Kulhari
MD - Skin & VD