A 22 year old male (lives in a hostel) has back acne and some lesions below both the buttocks, both since three years. Itching is sometimes present over the back, but not on the buttocks. No allergies. Not on any medications. Some lesions are present over the inner aspect of the knees. Can this be due to a vitamin deficiency? Please share your ideas regarding treatment for this case.
From the picture it appears more of a comedonal acne .person normally has tendency to develop that .you can give him benzoyl peroxide or salicylic acid wash and topical retinoid like retin A
Retinoid cream and benzoyl peroxide has to be applied o different times
From the provided images, it appears to be Keratosis Pilaris which is often associated with xerosis and atopic eczema. The skin of the patient appears very dry, so advise moisturization along with topical retinoids. You may advise ammonium lactate lotion in 12% or salicylic acid lotion in 6% concentration.
I do agree with diagnosis of keratosis pilaris, this is a commoner site after shoulder and arms, will definitely get relief by topical moisturizer and topical retinoids