Hello... This is Dr. Pavan... Glad to answer ur query. Acne as such is a disease of skin, due to the hormonal changes in body. Each person skin react differently to these changes. Some people will be highly sensitive to it. Seems like u are too, by the look of it. It was nice that u shared a pic. The cystic form with pus collection indicates secondary bacterial infection. This will require systemic antibiotic treatment and few topical skin care agents which can be prescribed after complete examination