A 20-year-old girl has big breasts and small breasts. What is the reason?

I don't know female friends, do you usually observe the size of breasts carefully, and will you find that breasts are always on one side?

In fact, if the breast deviation between one big and one small is not great, it is a normal phenomenon and does not affect the normal appearance and image. However, if there is a big difference between the left and right breasts, we should pay attention to it, which may be caused by the following reasons.

Problems of estrogen and progesterone in the body

Because the breast buds with strong sensitivity to estrogen and progesterone in the body develop first, grow faster and appear larger; The breast bud on the side with poor sensitivity is smaller because of its slow development and slow growth;

Asymmetric movement of limbs

Asymmetric movement of limbs easily affects local blood circulation. If one upper limb or pectoral muscle is exercised for a long time, one breast will develop faster and stronger.

Sleeping posture problem

Some people habitually sleep on one side. Sleeping on your side for a long time can lead to asymmetric breast development.

Breast diseases

When one breast is undeveloped, one breast is acquired, one breast is injured or inflamed, or one breast has tumor or other lesions, there will also be asymmetry in bilateral breast development. Such as hyperplasia of mammary glands, breast cancer and mastitis.

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Underwear problem

Underwear must fit, and if it doesn't fit, there will be problems of different development on both sides. At the same time, pay attention when wearing it.

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