Pain from the armpit to the upper part of the breast can be seen after exertion, trauma, or even muscle damage to the pectoralis major muscle or muscle fibers, and the patient will show pain, which usually improves after effective rest and treatment. In addition, the incidence of breast hyperplasia is also very high, and it is caused by endocrine disorders. Patients may experience swelling and pain in the breast after straining, staying up late or getting angry, and the pain may also radiate to the affected armpit or under the shoulder blade. If necessary, you can choose to use Chinese medicine to treat this disease, which can play a role in activating blood stasis, eliminating stasis and dispersing nodules. You should pay attention to the regularity of life, not to stay up late, you can properly exercise.