Swelling causes a pimple to develop. Several things can trigger a pimple on the lip, including: Anyone can develop pimples on the lip, but some may have a higher risk. Risk factors include ...

Unlike pimples, cold sores can appear anywhere on the lips or around the mouth. Cold sores often occur with other symptoms, which can help you distinguish them from a lip pimple. Cold sore ...

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Acne can develop due to hormonal imbalances in the body and result in skin pores becoming clogged with oil and dead skin cells. This blockage causes patches of skin to bulge, resulting in a pustule.

Welcome to Ask Doctor Zac, a weekly column from news.com.au. This week, Dr Zac Turner explains how lip balm could be damaging your lips.