Occasional chin pimples are normal, but persistent or severe acne may point to an underlying condition. For women especially, PCOS (polycystic ovary syndrome) can cause stubborn chin acne due to excess androgen levels.
Other health conditions affecting the endocrine system may also contribute to hormonal acne. If you’ve tried every skincare product and lifestyle adjustment with little success, it may be time to speak with a doctor about possible internal causes.