Acne may occurs by four main factors such as; hair follicles plugged with dead skin cells, oil production, clogged pores and bacteria. It typically appears on face, neck, chest, back, and shoulders which are the most oil gland areas. Acne may worsen by hormones, certain medications, diet and stress. You can keep away from acne by take care of your sensitive skin and eat proper food which is not too greasy. Moreover, carefully remove your cosmetics regularly.