If you have ever felt like your favorite bra fits you perfectly on Monday but feels really uncomfortable by Friday you are not imagining things. For women breast size is rarely the same all the time. From when you’re a teenager through to when you are older breasts are always changing because of hormones changes in your life and time.
Understanding what is usually okay can save you a lot of worry. Here is a detailed look at why breasts change and when those changes are a normal part of life.
1. The Monthly Changes: Your Period
The common reason breasts change size is because of your monthly period. During the time leading up to your period your body has progesterone and estrogen.
- What happens: These hormones make the milk ducts and mammary glands bigger. They also make your body hold onto water, which can make your breasts feel heavier, thicker and more tender.
- The result: It is completely normal to feel like your breastsre a little bigger right before your period. Usually they go back to normal once your period starts and hormone levels go down.
2. The Effect Of Weight
Breasts are made up of a mix of tissue and fat. The amount of fat and tissue can vary from person to person.
- What happens: If your breasts have fat you will probably notice changes in your breast size when you gain or lose weight.
- The result: It is standard for breast size to change a little when you gain or lose a pounds. However some women have breasts that’re more dense which means their size does not change much even if they gain or lose weight.
3.. After
Maybe the most noticeable change happens when you are pregnant or have a baby.
- The growth: When you are pregnant more blood flows to your breasts and they get ready to make milk, which can make them bigger.
- The change after: After you stop breastfeeding or when your body is recovering after pregnancy your breasts might look smaller or less full than they were before. This is often because the tissue that supports your breasts has stretched out.
- The result: Even though your breast size might go back to what it was the shape and how tight your skin is often changes forever.
4. The Time Before And After Menopause
As women get closer to menopause their estrogen levels start to decrease. This leads to a process called involution.
- What happens: The tissue that makes milk starts to shrink and is replaced by fat. Because fat is softer than the tissue that makes milk your breasts might feel less firm and sag more.
- The result: Many women actually notice their breasts get a little bigger during menopause because they gain weight as they get older even though the inside of their breasts is changing.
What Is Usually Okay?
In the world of the body what is usually okay can vary a lot. Here is a quick list of things that’re usually not a problem:
| Feature | Is it Normal? |
| Asymmetry | Yes. It is incredibly common for one breast to be a different size or shape than the other. |
| Areola Changes | Yes. Bumps (Montgomery glands) and hair around the nipples are standard. |
| Cyclical Tenderness | Yes. Soreness that comes and goes with your period is rarely a sign of illness. |
| Stretch Marks | Yes. These occur whenever the skin expands rapidly (puberty, pregnancy, or weight gain). |
When To See A Doctor
While changes in breast size are normal some changes should be checked by a doctor. You should talk to a doctor if you notice:
- Lumps: Any new hard lump that feels different from the rest of your breast tissue.
- Skin changing shape: If your skin looks like a peel or if it is red and does not go away.
- Fluid coming from your nipple: Especially if it happens on its own is bloody or only happens in one breast.
- One breast getting much bigger: If one breast grows a lot bigger in a time without a clear reason related to your hormones.
The Main Point
Your breasts are very sensitive to what’s going on inside your body and to your hormones. Getting to know what your breasts are like at times of the month is the best way to tell if something is normal or if you should see a doctor.
Good advice: Try to get a bra every two years. Since your body is always changing your bra size is probably changing too.
