also: おとなにきび
adult acne
Refers to acne that occurs in adults, typically after the teenage years. Often used in skincare and dermatology contexts.
Lately, I've been troubled by adult acne.
Moisturizing is important for adult acne care.
General term for pimples or acne, often associated with teenagers. 大人ニキビ specifically refers to acne in adults.
Most common spelling; uses katakana for ニキビ to distinguish from the general word for pimples.
Hiragana spelling; less common but still seen.
Kanji spelling using 面皰 for にきび; very rare and mostly found in medical or formal contexts.
Compound of 大人 (おとな, 'adult') and ニキビ (にきび, 'pimple/acne'). The word にきび is of uncertain origin, possibly related to にくきび (肉黴) or mimetic roots.