Doctor's Answers (1)
Differin (a.k.a. Adapalene) is generally the most well-tolerated retinoid and hence it is widely used for acne. It is alright to use a thin layer over the affected areas only but it has benefits for the skin over the whole face so I like to recommend it for full face use. Important notes:
Differin itself helps to reduce PIH and also prevent acne (by reducing sebaceous gland activity). There are a variety of pigmentation creams available so it is best to ask your doctor for advice on the exact nature of the cream given and whether Differin works well with it.