Acne and the Menstrual Cycle. Why Does Your Skin “Go Crazy” a Week Before Your Period? Almost every woman is familiar with this scenario: everything seems to be under control, your skincare routine is working, your complexion is smooth—until suddenly, about a week before your period, painful, inflamed breakouts appear on your jawline, chin, or cheeks. This isn’t a coincidence or the result of “not washing thoroughly.” It’s pure physiology and the result of hormonal fluctuations.

Hormones Under the Microscope: Progesterone vs. Estrogen

The menstrual cycle involves constant changes in hormone levels.

• First half of the cycle: Estrogen dominates. The skin is hydrated and radiant, and the pores appear smaller.
• The second half of the cycle (after ovulation): Estrogen levels drop, while progesterone rises sharply. Progesterone is the main culprit behind “premenstrual breakouts.” Progesterone stimulates the sebaceous glands to produce significantly more sebum, which becomes thicker and clogs pores more easily. In addition, just before menstruation, the relative levels of androgens (including testosterone) also rise, which further exacerbates the problem.

A Mistake Made in Panic: Aggressive Drying

When we notice changes appearing, our instinctive reaction is to want to combat them immediately. We reach for heavily drying alcohol-based toners, spot treatments with acids, or harsh exfoliants. This is the surest way to ruin the hydrolipid barrier. Overly dry skin begins to produce… even more sebum to defend itself. The inflammation spreads further, and new pimples appear on the face.

MCS Laboratory’s Strategy: Calm and Balance

The key to getting through this time is to treat your skin gently, not to fight it. Your routine should be based on gentleness.

• Core Action – Balance (Foam and Cream): Instead of searching for new products a week before your period, stick to your skincare routine with the acne line from MCS Laboratory. Our gentle Cleansing Foam will remove excess thick sebum without compromising the skin’s protective barrier. The moisturizing cream helps restore balance by regulating sebum production and soothing developing inflammation, while ensuring optimal hydration of the skin.

Get through this natural phase while taking good care of your skin. The gentle formulas from MCS Laboratory will help you stabilize your complexion without leaving behind scars or post-inflammatory hyperpigmentation.

Summary: Hormonal fluctuations before your period are a natural physiological process to which the skin reacts by producing more thick sebum. Don’t panic, and don’t dry out your skin with harsh products. Be consistent in using the gentle, two-step Skincare Set for Sensitive Skin with Acne from MCS Laboratory. Gentle cleansing and a balancing cream will help you get through this challenging time by nipping inflammation in the bud and restoring your skin’s lost balance.