If there is no redness, swelling, pain, etc., and the volume is as small as a soybean or smaller, it may be a small soft fibroid, lipoma, etc., which generally needs no special treatment and can be temporarily observed. If it is painful to press the meatball, or if the skin around it is red, swollen and other obvious clinical symptoms, it may be caused by infection, which is common in folliculitis, acute mastitis, etc. Common causes and treatment methods 1. Soft fibroids: Since soft fibroids tend to occur in the axilla and neck, the clinical manifestation is mainly a tipped growth above the skin surface, which can be in the shape of a meatball. Generally, it can be cured after laser and surgical treatment. 2. Lipoma: Since lipoma is usually found in the neck, axilla and shoulder, when the onset site is the axilla, single or multiple lumps of different sizes will appear, with the feeling of meatball, mostly benign tumors. However, if the tumor is abnormally enlarged and accompanied by pain, upper limb dysfunction and other circumstances suggesting malignancy, or if you feel that it affects the aesthetics, you can choose surgery to remove it, which generally has a better prognosis; 3. Folliculitis: when it invades the axillary tissue, it will cause patients to have uncomfortable symptoms, such as axillary meatballs, local pain, itching and so on. Generally mild folliculitis will subside on its own, and if necessary, iodophor solution and alcohol can be applied to disinfect first, and then antibiotic ointment can be applied to promote the subside of inflammation; 4. Acute mastitis: the meatballs felt when touching the armpit may be the swollen axillary lymph nodes triggered by patients with acute mastitis. The main treatment principle is to control the infection and empty the breast milk. Generally, timely treatment can achieve the effect of cure in mild cases, while serious cases may require surgery for treatment; 5. Sebaceous abscess: it may lead to multiple hair follicles not being open, causing the accumulation of secretions and eventually leading to the formation of meatballs in the armpit, and the treatment is mainly surgical removal; 6. Breast cancer: because breast cancer is metastatic, when malignant tumor cells metastasize to armpit, it may cause cancer to protrude in the armpit. When breast cancer metastasis occurs, local radiation therapy, intravenous chemotherapy, gene targeting therapy, endocrine therapy, etc. can be given. Metastasis of breast cancer mostly suggests a poor prognosis. It is recommended to treat actively at this time to avoid delaying the disease again and to achieve the purpose of improving the survival rate. Attention When there is a meatball in the flesh of the armpit when touched, if it is accompanied by obvious discomfort symptoms and it is not clear what causes it, it is recommended to go to the hospital for examination in time. Daily attention should be paid to diligent change of clothing, to maintain cleanliness and hygiene, diet should be less spicy, stimulating food to reduce stimulation.