There are many factors that cause left axillary pain without lumps in women, mostly considered to be related to non-disease factors such as clothing friction, axillary muscle strain, hormone level disorders, etc., but also may be related to breast disease, lymphatic disease, cardiovascular disease and other factors. The pain caused by non-disease factors generally do not need treatment, for disease factors caused by the female left axillary pain, need to identify the specific cause, for the cause of treatment. 1, non-disease factors 1, clothing friction: If women’s left underwear is too tight, and lead to excessive friction with the skin, there may be left axillary pain, it is recommended that women can wear some loose, soft clothing, can gradually relieve the pain in the left axilla; 2, axillary muscle strain: If women have improper exercise, such as playing ball, shoulder and back sports when the force is not appropriate, can cause left armpit pain. First of all, you should temporarily stop the movement, carry out appropriate massage, hot compresses, reasonable rest after most of the self-healing, do not worry too much, it is recommended that women in the movement, pay attention to good warm-up preparation, slow down the movement, reduce the damage to the local muscles; 3, hormone level disorders: women due to the physiological cycle, pregnancy cycle, hormone level changes and other reasons, may also cause pain in the left armpit without lumps, mostly seen in the parametrium The appearance of pain, when this symptom occurs, generally do not have to deal with, most with the end of the special period and self-healing. Second, the disease factor 1, breast disease: common is due to inflammation of the mammary gland leading to female left axillary pain, women often manifest as breast redness, swelling, heat, pain and other manifestations, need to timely consultation for anti-inflammatory treatment, such as compliance with medical advice to use penicillin or cephalosporin drugs. When there is abscess formation, surgical puncture and drainage treatment is also required; 2. Lymphatic disease: common in the left axillary lymph nodes inflammation, often due to bacterial invasion, trauma, low immunity and other reasons, women can appear local redness, pain, may have swelling, but no obvious lumps, need to consult the doctor after the use of amoxicillin, cefadroxil, roxithromycin, clindamycin and other antibacterial drugs for treatment. If the symptoms are serious, surgical treatment such as lymphatic drainage or incision and drainage can also be carried out; 3, cardiovascular disease: some myocardial ischemic diseases can also lead to pain in the left axilla of women, due to less blood supply to the heart resulting in reflex pain, such as coronary atherosclerosis, thrombosis, vasculitis and other diseases, manifested as chest tightness and shortness of breath, tightness-like pain can occur when exerting tension, radiating to the left shoulder or left upper arm, usually It can be relieved by itself after resting and is easily ignored by women. Systematic treatment is required after consultation, and antiplatelet drugs, beta-blockers, calcium antagonists and other drugs are commonly used clinically for treatment, and surgical bypass surgery can also be performed for those with severe multi-vascular lesions or stenosis; 4. Respiratory diseases: some diseases such as pleurisy can also lead to left axillary pain, often manifested as fever, cough, dyspnea, chest tightness, etc., with stabbing pulling pain. The symptoms are aggravated by coughing. If the discomfort is serious, you can first lie on your side to the onset site to relieve the symptoms, and if necessary, you can follow medical advice to treat with levofloxacin, azithromycin and other drugs; 5. Neurological diseases: such as intercostal neuralgia, due to damaged nerve stimulation in the chest leading to local pain, often manifested as herpes, chest and abdominal pain, which is paroxysmal or persistent, and radiates to the upper back, chest and abdomen. Clinical treatment with anti-neuralgia drugs such as carbamazepine, amitriptyline and gabapentin is commonly used, as well as physical therapy such as ultraviolet light, ultrasound and microwave, and nerve block and nerve destruction. If the symptom relief is not obvious, treatment such as surgical side cutting the nerve can be chosen. In addition, left axillary folliculitis, inflammation of veins or arteries, lung cancer, etc. can also cause pain without lumps in the left axilla of women, who need to actively seek medical attention to clarify the cause of the disease and carry out systematic treatment for the cause.