The back of the neck often has acne, the most common is folliculitis. Often staying up late, eating spicy and stimulating food, eating fried and baked food, insomnia, anxiety, depression, etc., these conditions are easy to lead to acne. The most common form of folliculitis is bacterial infection, which is mainly caused by Staphylococcus aureus. In case of folliculitis at the back of the neck, the anti-inflammatory ointment can be applied locally, and Flusilic acid ointment or mupirocin ointment can be applied locally. There is obvious redness, swelling and pain, and oral antibiotics are also needed. On diet, we should pay attention to light diet, avoid spicy and stimulating food, and eat more fresh vegetables and fruits rich in vitamins.