Acne or pimples are caused due to over active sebaceous or oil secreting glands of the skin, yet dry skin can also have acne
depending on personal hygiene. Apart from these , environmental and hormonal factors are common causes of acne.
Acne or any kind of rash could be caused due to dandruff. When dandruff flakes fall over the face they clog the pores and promote accumulation of dirt due to which there could be an inflammation or acne. Similarly, sebum or oil secreted can also clog the skin pores and cause
problems. In addition, the dandruff can cause
blemishes on the skin.
So when you have acne, dandruff may be a cause. People prone to acne should was their face frequently to get rid of the excessive oil and use water based cosmetics alone. Other factors causing acne could be hormones, stress etc which can be taken care of. A healthy diet is advisable for all the problems.