Acne can appear even when you believe your skin is clear and healthy. For many women, this often happens in the days leading up to their menstrual period. Despite a consistent skincare routine, painful, reddish pimples may emerge around the chin or jawline.
The recurrence of such acne is linked to the natural hormonal shifts that occur throughout the menstrual cycle. These hormonal changes can clog skin pores and increase the production of skin oil (sebum). Being aware of when these shifts occur allows you to take proactive measures to manage or prevent breakouts.
Experiencing acne before a period is common. The issue is usually linked to hormonal shifts rather than the use of cosmetic products. The hormonal changes that take place in the body during the days before menstruation can make the skin oilier and exacerbate acne.
Fluctuations in hormones such as estrogen, progesterone, and androgens affect the skin’s production of sebum (natural oil) at different stages of the menstrual cycle. Androgens stimulate the sebaceous glands to produce natural oil, which serves to protect the skin. However, when this excess oil mixes with dead skin cells, it can clog the pores, leading to inflammation and discomfort.
When estrogen levels drop, the influence of androgens becomes more pronounced. Androgens increase the secretion of oil (sebum) on the skin. This oil combines with dead skin cells to block the pores, creating an environment where bacteria can multiply rapidly—ultimately resulting in inflammation and irritation of the skin. A review published in *Health Science Reports* in 2025 discusses the roles of hormones, diet, and genetic factors in the development of acne. It notes that androgens play a part in lipid metabolism, and that consuming foods with a high glycemic index can exacerbate acne. Although a pimple may appear suddenly, it actually takes several days to form beneath the skin’s surface. Due to hormonal fluctuations, acne may become more pronounced just before the onset of menstruation.
Fluctuations in progesterone levels may influence skin health and the condition of hair follicles. Since it can take several days for a pimple to fully develop, the one you notice today may have begun forming beneath the skin a week earlier, triggered by hormonal shifts.
For this reason, in addition to treating acne once it appears, it is crucial to maintain proper, proactive skin care. If you tend to develop acne or rashes at the same time each month, you might consider establishing a consistent skincare routine in advance.
Typically, acne related to the menstrual cycle appears on the chin, along the jawline, and sometimes toward the neck—areas that are particularly sensitive to hormonal changes. However, breakouts can also occur in other parts of the body. Hormonal acne often manifests as soft, swollen bumps deep within the skin, though in some cases, it may appear as whiteheads.
While it is normal for the skin to undergo certain changes throughout the menstrual cycle, the specific experience can vary from person to person.
During the first five days of the menstrual cycle, hormone levels are at their lowest. At this stage, the skin may feel dry or appear slightly wrinkled, while any existing blemishes or sores begin to heal. From the sixth to the thirteenth day—the phase leading up to ovulation—estrogen levels begin to rise. During this time, many people find their skin looking clearer and more radiant than usual.
From the fourteenth to the twenty-fifth day—the phase following ovulation—progesterone levels may increase, which leads to greater oil (sebum) production. This can cause skin pores to become clogged.
Around the twenty-second to the twenty-third day—the period just before the start of the next menstrual cycle—hormonal shifts can make acne more pronounced.
Remember, this should be treated as a general recommendation rather than a strict rule. Since the length of the menstrual cycle and hormone levels vary from person to person, acne or other skin issues may not necessarily appear on the exact same day each month.
To help prevent acne, cleanse your face twice a day using a gentle cleanser. Avoid rubbing or applying harsh pressure to your skin. It is best to use cosmetic products that do not clog your pores—these are known as.
