Your Cycle and Your Skin: What Hormones Change Week to Week
Something I noticed on my own skin took me far too long to connect.
There are weeks where my skin glows. Weeks where it doesn't. Weeks where the same cleanser works beautifully, and weeks where it suddenly stings. For years I thought that was random, or that I was doing something wrong, or that I needed a new routine every time it changed.
It wasn't random. And I didn't need a new routine.
Your skin changes across your cycle because your hormones do. Once you understand what's happening underneath, you can stop blaming your products and start working with your body instead of against it.
Why your skin changes week to week
Your skin has receptors for every major reproductive hormone. Estrogen, progesterone, testosterone — they're all talking to your skin cells. When their levels shift across the month, your skin's behaviour shifts too.
This isn't a small effect. Estrogen influences how much water your skin holds, how quickly it heals, and how plump it looks. Progesterone changes oil production and barrier function. Right before your period, inflammation rises across the whole body, and the skin is one of the first places you see it.
That cleanser that stung this week probably didn't change. Your skin did.
The four phases, briefly
Menstrual phase (roughly days 1 to 5)
Estrogen and progesterone are both at their lowest. Your skin can feel dry, dull, a little flat. Barrier function is lower, so things that normally sit fine on your skin can suddenly feel too much.
What tends to help: simplicity. Fewer actives, more moisture, nothing that strips. This is not the week to try a new retinol.
Follicular phase (roughly days 6 to 14)
Estrogen rises steadily, which is why most women notice their skin looks its best in the week before ovulation. Collagen production climbs, your skin holds water more easily, healing is faster.
This is the week you can introduce something new, exfoliate without regretting it, or wear less makeup because your skin is doing the work for you.
Ovulation (roughly day 14)
Estrogen peaks. If you're going to glow, this is the day. It's also often the day your face looks its most symmetrical, your pores look smallest, and the whole thing feels effortless.
Enjoy it. It is science, not luck.
Luteal phase (roughly days 15 to 28)
Progesterone takes over. Oil production climbs. Breakouts tend to show up along the jaw and chin. In the final few days before your period, inflammation spikes and you may notice redness, sensitivity, or that familiar hormonal breakout.
What tends to help: gentle, barrier-supportive products. Natural deodorant that works with your skin, not against it, matters more this week because the whole system is more reactive. If you're going to react to synthetic fragrance or aluminium, this is often the week it shows up.
The small shifts that actually help
You don't need four separate routines. You need a baseline routine you trust, and a few small shifts you can make depending on where you are in your cycle.
A few that have made the biggest difference for me:
Stop introducing new products in the final week. If your skin reacts to something right before your period, you'll blame the product when it's probably just the week.
Simplify in your menstrual week. Pull back on actives, lean into moisture. Your barrier is lower, so overworking your skin here backfires.
Trust the follicular week. This is when your skin can take the most. If you've been wanting to introduce something new, this is the window.
Pay attention to what you put on your underarms. The lymphatic system under your arms is right next to breast tissue, and the skin here is thin and absorbent. Switching to a thoughtfully made natural deodorant is one of the smaller swaps that pays off most across the full cycle.
The point of all this
I'm not asking you to track every day or buy anything new. I'm asking you to stop blaming your routine every time your skin behaves differently.
Your skin isn't being difficult. It's being hormonal. Once you can see that pattern, the whole relationship with your face softens. You stop panicking about every blemish, you stop overcorrecting when things calm down, and you start trusting that this is a system that works.
It's not failing you. It's talking to you.
xo Jac