Acne and pimples are synonyms, acne is medical term while pimples is common term. Acnes are basically disease of sebaceous glands (Oil glands), commonly present on upper part of body like scalp, face, chest, upper back and arms. Basically there are few changes that can lead to acne or swelling in sebaceous glands, changes like –
- Increase oil production under influence of hormones
- Increase layers in the duct of glands leads to blockade of sebaceous duct
- Bacterial infection ( specially p. acne bacteria)