part using a 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 acne.Also try to keep your hair free of dandruff by using good antidandruff shampoos.You can also apply benzoyl peroxide creams or clindamycin cream on the acne.After shaving apply cold compresses on the neck and some calamine lotion on the neck.
If the symptoms persist,then oral antibiotics may be needed.Pls consult a dermatologist then.
Hope it helps.Take care and pls do keep me posted if you have any additional queries.Kind regards.