Hello,
This sounds like infection and
dermatitis.
Dermatitis can result from infections, allergies, and irritants. Infections can be due to fungi, bacteria both of them (more likely) or less likely virus based on your description.
This part of the skin is very delicate and can be easily damaged due to friction and mechanical irritation (following sexual activity) or exposure to an allergen (soap, cream). Secondary infections can easily occur once the skin is damaged.
Foul smell usually occurs with bacterial and fungal infections. White discharge is due to pus formation from dead bacteria.
Infections of hair follicles and the sebaceous glands in this part are common too and give similar picture.
Culture and sensitivity is the best way to identify the causative organism and to prescribe specific
antibiotic therapy. It is very important to exclude STDs.
Direct clinical examination is essential, so I would advise you to follow up with your doctor for exclusion of other skin diseases like
psoriasis.
Please keep us updated.
Best regards.
This answer does not substitute for direct medical consultation.
Dr. Safaa Mahmoud.
MB BCh, MSc Internal Medicine. MD Medical Oncology.
PhD Experimental Medicine and Biochemical Science.