Detailed answer

Blackheads, which are clogged hair follicles, are typically caused by excess oil production, dead skin cells, and bacterial buildup. They are unrelated to an allergic reaction to skincare products. Allergic reactions usually manifest as redness, itching, hives, or rashes, rather than blackhead formation. Blackheads can be influenced by factors such as hormonal changes, poor skincare routine, diet, and certain medications. To prevent and treat blackheads, it is important to follow a regular skincare regimen that includes cleansing, exfoliating, and using non-comedogenic products to avoid clogging the pores. If you suspect an allergic reaction to a skincare product, discontinue its use and consult a dermatologist for proper diagnosis and guidance.