Acne is a skin condition where blocked hair follicles cause pimples, often on the face, chest, and back. It’s common in teenagers and caused by excess oil, bacteria, and inflammation.
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Hair loss and hair thinning are conditions where hair falls out or becomes less dense, often due to genetics, hormonal changes, or stress.
Stretch marks are lines on the skin that develop when it stretches or shrinks rapidly, often due to rapid weight gain or loss, pregnancy, or growth spurts.