Pain near the left breast in men is considered to be the following conditions: first, it may be suffering from mastopexy, which can also occur in men, mainly due to endocrine hormone imbalance in the body, with the main symptoms being breast lumps, pain and worsening temper. Secondly, it may be due to inflammation of the rib cartilage, which is mostly seen in overexertion or cold weather, and is a sterile inflammation with painful location near the left chest and tingling sensation when in pain. Then, it may also be due to a lung infection in men resulting in pleurisy, which mainly manifests as chest pain, especially when taking deep breaths. In addition, the pain may occur because the patient has a heart condition. Considering the complex etiology, once the pain near the left breast occurs, you should go to the hospital promptly and then cooperate with the treatment according to the examination results.