Milia are tiny raised bumps which are yellow or white in colour and there are different types. They form when keratin (protein) is trapped under the skin surface. Milia are often found on the eyelids, cheeks and forehead but can appear on other parts of the body. They are normally harmless and not painful or itchy. Milia can affect people of all ages but are very common on newborn babies. No treatment is needed as they normally disappear on their own in babies.