Hello. Welcome to ask the doctor.
I understand your concern.
I have seen the attached photograph also.
From the photograph, it looks like ulcer which may seems to be traumatic. Another differential for such ulcer is Pyoderma Gangrenosum.
It is a condition of the skin characterised by an ulcer with undermined edges.
In both cases, treatment is directed towards ulcer management.
I prefer to advise oral antibiotics like cloxacillin and topical antibiotic cream like mupirocin 2 percent over the affected area.
Get your blood sugar levels done.
Visit your doctor so that he can do a physical examination and give you a prescription.
You can share my opinion with him.
I hope it helps.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.