The left breast may be painful due to excessive pressure, mastitis, breast cancer and other factors. 1. Excessive pressure: If you wear underwear that is too tight or if your breasts are subjected to constant pressure, you will experience vague pain in your breasts, which can be resolved by lifting the pressure. 2. Mastitis: usually includes lactation mastitis and non-lactation mastitis, the former is related to infection, the latter is mostly related to immune factors, in addition to the symptoms of breast pain, may also be accompanied by breast swelling, fever and other symptoms. 3. Breast cancer: it may be related to heredity, hormonal changes and other factors, which may cause pain in the breast area, manifested as involving pain, and may also be accompanied by symptoms such as breast lumps, nipple retraction, and localized skin depressions. At the same time, the left breast pain in the sixties does not exclude the possibility of coronary heart disease, chronic gastritis, local skin disorders. It needs to be carefully identified. If you have a vague pain in your left breast in your sixties, accompanied by other abnormalities, it is recommended that you seek medical attention for examination and treatment to avoid continued aggravation of the lesion.