Hi.. Thanks for your query
You have two different concerns..as for the brown patches, you might be suffering from an eczematous disorder. They are frequently recurrent and moderate to severely itchy. Topical steroids/ tacrolimus/ pimecrolimus
are he mainstay of therapy. You can start oral anti histaminics to combat the itching, as the itching creates an itch scratch cycle which perpetuates the lesions. Keep the areas moist , it reduces the recurrence.
As for the acne
, you can start application of Clindamycin
gel twice daily n face. Use Cetaphil
Cleanser for oily skin .you can apply the Retinoid
creams topically at night starting with alternate night application and as your skin tolerates it, you can use it daily.do not use heavy creams and stick to gel based moisturisers and sun screens.
Hope this helps.Take care.