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Closed comedo; a plugged follicle trapped beneath the skin surface. Treat with topical retinoids, benzoyl peroxide, or salicylic acid.

Open comedo; a clogged pore where the plug enlarges and pushes through the surface of the skin. Treat with salicylic acid, topical retinoids, or extraction by a professional.

Inflamed, red, tender bump without a head. Recommended treatments include gentle skincare, benzoyl peroxide, and avoiding picking or squeezing.

Inflamed red circle with a white or yellow center filled with pus. Treatment involves benzoyl peroxide, antibiotic creams, or avoiding squeezing.

Large, painful, solid lesions lodged deep within the skin. Treat with oral antibiotics, isotretinoin, or corticosteroid injections.

Large, pus-filled lesions that are often painful and can cause scarring. Treatment includes isotretinoin, oral antibiotics, or drainage and surgical excision.

Sudden onset of highly destructive inflammation, including systemic symptoms like fever and joint pain. Treat with oral steroids and isotretinoin under professional care.

Caused by heat, friction, and pressure on the skin, often from sports equipment. Treatment includes topical therapies and avoiding aggravating factors.

Acne caused by makeup, creams, or lotions that clog pores. Treat by switching to non-comedogenic products and gentle cleansing routines.