Pimples and blackheads. 5 or 4 months.

hello,Blackheads form when a clog or plug develops in the opening of hair follicles in your skin. Each follicle contains one hair and a sebaceous gland that produces oil, called sebum, which helps keep your skin soft. Dead skin cells and oils collect in the opening to the skin follicle, producing a bump called a comedone.Prescription treatments for non-inflammatory acne (whiteheads as well as blackheads) tend to be more effective than consumer products. These include gels or lotions containing retinoids (vitamin A), antibiotics, benzoyl peroxide (antibacterial) or azelaic acid. These options are also prescribed as combination treatments.avoid using oil based sunscreen or lotion, avoid picking of acne, frquent face wash will help. consult a dermatologist for the prescription.