What Causes Oily Scalp,pimples And Excess Chin Hair Growth?

I have oily hair, I wash it every day but never dandruff. I have trapped sebum and blackheads on my face. I get a few pimples. At the moment my face has the most I have experienced in a while and is really dry in some areas. Either side of my nose and Chin. I also have thick black hairs that grow from the underside, mainly RHS of my chin which I pluck daily.History.I am 33 and when I was 15 took Rhoaacutane for a while which made my skin a million times worse before it made it slightly better. It really dried me out, skin, lips, hair and I would never take it again. I also had a semi undiagnosed issue 2 years ago involving initially thought to be scabies. It wasn t. I went to a dermatologist and was told maybe mild psoriasis or something else I cannot remember the name. I had a scraping and basically it was unconfirmed. I took antibiotics and had psoriasis cream and it resolved.Any information you could provide would be helpful. I feel as though there may be something wrong with me. Food allergy etc. Thanks.