part using a back brush and frequently change your bed sheet, as it is conducive for bacterial growth. Engage in a diet that is low in sugar and fat but is rich in vitamins. This prevents acne by preventing the buildup of excess oil on the skin. Also refrain from touching or squeezing your shoulder
by using good antidandruff shampoos. You can also apply benzoyl peroxide creams or clindamycin cream on the acne.
If the symptoms persist then please consult a dermatologist and get cysts ruled out.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.