White Pimple Inside Lip. Mouth pimples medically known as canker sores are small painful raised ulcers that appear on the membrane of the oral cavity whether on the palate roof of the mouth inside the cheeks gums under the tongue throat or inside lips. An ingrown hair is formed when a hair strand grows sideways underneath the skin or grows back into the skin.

Less commonly they affect the inside of the cheeks roof or floor of the mouth and the tongue. Mucous cysts usually appear on the lips inner surface. White pimples in mouth Localized abnormalities or sores inside the mouth may be caused by varying causes.
Mucous cysts are painless thin fluid-filled sacs.
Some bumps on the inside of lip dont hurt or cause pain. Hard and recurrent lumps bumps that keep coming back for years can mean a cancer but at the same time they can be harmless. The other possible cause of a pimple on vag lip are bumps known as ingrown hair. Pain is a significant symptom of mouth ulcers.