Perfect symmetry in female breasts simply does not exist. They are like sisters, not twins, and differ — just like our feet or hands — in size and shape. At first glance, however, we barely notice this. Sometimes they have also changed over time, for example due to an illness. The reasons are varied. Medically speaking, it is unproblematic if the left breast is slightly fuller than the right, or if one nipple sits a little higher than the other.
However, if the difference is very significant or causes you such psychological distress that your self-esteem suffers, you may want to consider a correction. In my practice in Frankfurt am Main, I specialise in breast surgery, among other things, and I am happy to advise you on how your breast asymmetry can be corrected in your specific case.
When is it considered breast asymmetry?
The medical term for asymmetrical breasts is anisomastia. It is present when there is a clearly visible deviation in the shape of the breasts, or when the size difference amounts to at least one full cup size. The position can also differ. The medical literature suggests that around a quarter of all women have a developmental breast asymmetry that goes beyond natural variation.
However, the threshold at which anisomastia becomes a problem is ultimately always determined by personal perception. That is why I first ask my patients during their appointment at my practice what exactly bothers them. Does the bra fit poorly on one side, for example? Or does the uneven shape or size bother them in some other way? From my experience, there are women who suffer greatly even from a very slight asymmetry, while others have had no problems for many years despite a more pronounced anisomastia. I take both seriously and try to find the best solution for each individual.
What causes unequal breasts?
There are various causes. The most common reason, as so often, is genetics. The size, shape, and position of the breasts — like many other physical characteristics — are inherited from mother and father. If breast abnormalities occur more frequently in the family, the risk of inheriting them is high.
The second biggest factor is hormones. During puberty, these hormones drive breast growth. However, the breasts rarely grow in sync. Deviations during this phase are therefore completely normal and, in most cases, even out by the end of puberty. In rare cases, a breast asymmetry remains after breast growth is complete.
Congenital breast malformations
Sometimes a shape asymmetry or size difference is caused by a congenital breast malformation. These include, for example, tubular breasts with their tubular shape and enlarged areolas. Poland syndrome is very rare. It is characterised by the underdevelopment or complete absence of the chest muscle (pectoralis major) on one side. The incidence is between 1:10,000 and 1:100,000, depending on the source.
Changes over the course of life
Genetics and hormones are not always responsible for differences in breast size. In some patients, the asymmetry is also acquired over the course of life, for example through:
- Pregnancy and breastfeeding: Both can significantly change the breasts — for example, if the baby prefers to feed from one breast. Sometimes the breasts do not return to their previous shape evenly after breastfeeding, leaving a more or less pronounced asymmetry.
- Weight changes: Significant weight gain or loss can also change the appearance of the breasts, making them look uneven — for example, if one side gains more volume or loses more volume during weight loss.
- Illness: In some patients, the difference in size or shape is due to an illness such as breast cancer. During surgery, a large amount of tissue around the tumour often has to be removed, which can cause both breasts to look different.
- The ageing process: Age also plays an important role. Over the years, the tissue changes and volume is lost. This too rarely happens symmetrically, which is why differences in the shape and size of the breasts are not uncommon in older women.
When you should see a doctor about breast asymmetry
As a rule, unequal breasts are not a compelling reason to see a doctor — especially if you have had your breast asymmetry since puberty or for many years. However, you should take notice if the shape of your breasts suddenly changes, meaning one breast visibly grows or changes shape over the course of weeks or a few months. This should always be medically evaluated.
Studies suggest a certain link between asymmetries and breast cancer. However, these studies are somewhat older and definitive proof has yet to emerge. There is no reason to panic based on the data. It is, however, a good reason to attend regular check-ups.
For many women, a shape or volume asymmetry also has a psychological impact. From experience, I know that breasts of different sizes can undermine many women’s self-confidence. They feel uncomfortable in their own skin and have difficulties buying or wearing clothing. In some women, it even has a negative effect on their sex life. In such cases, it may be worth considering breast surgery to correct the asymmetry or to achieve breast equalisation.
What helps with breasts of different sizes?
This depends on how much the unequal breasts affect you. If the difference in shape or size barely restricts you in everyday life and otherwise mainly causes your bra not to fit properly, a visit to a specialist shop is often sufficient in my experience. The trained staff there can usually quickly find a bra that compensates for the difference — if necessary, with a removable insert. For most women, this is perfectly adequate.
What definitely does not help with unequal breasts are supposed miracle cures and exercises that frequently circulate on social media platforms such as Instagram or TikTok. Some of these even pose a serious health risk, which is why you should absolutely steer clear of them.
- Chest muscle training: This persistent myth originally comes from fitness guides for men with uneven chest muscles. The female breast, however, consists of glandular tissue and fatty tissue and rests on top of the muscle. Push-ups and other exercises unfortunately do nothing in this case. That said, they cannot cause harm either (as with sport in general).
- Creams, capsules, and massages: Unfortunately, these cannot correct unequal breasts either. On the contrary: with some capsules, the actual ingredients are uncertain, as they come from dubious sources. Do not take that risk in the first place.
- Hormone preparations: Taking hormones on your own initiative is at least as risky as swallowing questionable pills from the internet. Doing so interferes with a very sensitive regulatory system and risks serious health consequences.
- Targeted weight gain: This unfortunately works no better than, for example, trying to lose weight in a specific area such as the abdomen. Usually, both breasts grow proportionally and the shape of the breasts remains the same. Weight gain also places a burden on your entire body and creates new risks.
A reputable and lasting correction of breast asymmetry is only possible with the help of plastic and aesthetic surgery. Depending on the individual findings, various procedures may be considered. At my practice in Frankfurt, I offer the following treatment options, among others:
Unilateral breast augmentation
If a significant amount of breast tissue is missing on one side (e.g. following tumour surgery), this difference can often be effectively corrected by inserting a unilateral implant. On occasion, I also insert implants of different sizes on both sides if you desire an overall increase in breast volume. You can find out more about breast augmentation on the services page.
Own fat (lipofilling)
For moderate differences, treatment with the patient’s own fat may be an option. In the so-called lipofilling procedure, I remove fat from areas of the body such as the hips, prepare it, and introduce it into the breast. The advantage of this treatment option is that the breast feels very natural afterwards. However, the body reabsorbs some of the fat, so a repeat treatment is sometimes necessary. You can find out more on the services page for breast augmentation with own fat.
Unilateral breast reduction
If the larger breast is causing you discomfort and you wish to have it reduced to match the size of the smaller breast, I remove the excess tissue in one procedure and then lift the breast. To achieve a harmonious appearance, I also frequently reposition the nipple. Further information can be found on the services page for breast reduction.
Breast lift
If one of your breasts is drooping more than the other, a breast lift is often the most suitable option. During the so-called mastopexy, I lift the sagging breast, remove the excess tissue, tighten the entire glandular tissue, and reposition the nipple upwards. All the details about the breast lift can be found on the services page.
What you should know before corrective breast surgery
Unfortunately, I cannot promise you one hundred percent symmetry. The goal of any equalisation procedure is always a result that relieves your concerns and with which you are satisfied in everyday life. Small differences often remain because your ribcage itself is asymmetrically structured. Furthermore, your breasts may change again after surgery due to weight gain or a subsequent pregnancy. Ideally, your family planning should be complete and your weight should have been stable for some time.
The timing is also important. Before any surgical procedure, the breasts should be fully developed. For this reason, I treat asymmetries no earlier than between the ages of 18 and 21. Before every procedure, I also require either an ultrasound examination or a mammogram. This is the only way to detect any abnormalities and ensure they are not overlooked through the removal of tissue.
Let us talk about your breast asymmetry
All of the procedures mentioned above are performed under general anaesthesia at the Berger Klinik in Frankfurt. Which method is most appropriate for you will be determined in a personal consultation at my practice.
On-site, I can assess the asymmetry myself and recommend the right course of action for breast equalisation. I am fundamentally very realistic in my approach and only recommend what I also consider sensible from my aesthetic experience and what suits you personally. Book an appointment now via my online form, by phone, or by email.
Frequently Asked Questions (FAQ)
- Is it normal to have uneven breasts?
Yes, they’re actually more common than perfectly symmetrical breasts. About 9 out of 10 women have asymmetrical breasts. In most cases, the difference is barely noticeable to the naked eye and therefore isn’t a problem.
- Do breasts of different sizes even out during puberty?
That’s often the case. However, if the difference persists beyond the ages of 18 to 21, it generally doesn’t change anymore. In that case, surgery may be considered.
- Lassen sich asymmetrische Brüste ohne Operation korrigieren?
Conceal, yes—but don’t correct. For women who choose not to have surgery, I recommend visiting a specialty store. A bra tailored to breast asymmetry can work wonders visually.