If you have a small bump under your chest, you need to decide on the treatment according to the nature of the bump. The more common type is subcutaneous lipoma, which is a tumor formed by the abnormal proliferation of fat cells and is a benign tumor that can be removed surgically. For breast cysts, if the cysts are small, they can be followed up with ultrasound for a period of time, and the treatment is also surgical removal. The lymph nodes in the mammary gland also appear as small bumps, mostly due to inflammation of the lymph nodes, which can be restored to normal with oral antibiotic medication. Surgery is the only effective way to treat fibroadenoma. Breast cancer also manifests as small bumps in the breast and requires timely surgical treatment with chemotherapy and radiotherapy depending on the specific situation. If you have a breast cancer, you should try to visit a hospital to check the specific situation before treating it.