Pimples on the chin are common and are often caused by hormones, stress, and habits that people do every day. Hormonal changes, such as those that happen during pregnancy, menstruation, or when you change your birth control, are one of the main causes. Stress can also be a big factor because it raises cortisol levels, which makes oil production go up and clogs pores around the chin and jawline.
Food choices may also play a role. Flare-ups have been linked to sugary snacks, dairy, and processed carbs, especially diets with a lot of sugar. Touching your face a lot or not taking care of your skin properly can make breakouts worse. So can using harsh products that don’t help the skin heal.