Health Complications Caused by Large Breasts Large breasts can cause you cosmetic problems when coming to terms with your body. This causes many people to consider breast reduction surgery. There are also several physical reasons to undergo surgery. This is because large breasts can cause health problems that can make it difficult to function properly. If you suffer from any of these problems, breast reduction surgery could alleviate your problems, and is sometimes available on the NHS. Back Pain Caused by Large Breasts Having larger breasts means that there is much more weight on your chest when doing things such as lifting or bending over. This can put a lot of strain on your back, which can lead to back pain. Back pain can be a serious issue, especially when it prevents you from going about your normal activities. If your breasts are causing you back pain and this is preventing you from things such as working, exercising, or being active, you should seek medical advice