Patients pinch the particles under the armpit, in general, the common causes are mainly the following situations: First, obese patients can be accompanied by more adipose tissue accumulation in bilateral armpits, forming small fat particles, at this time, the fat particles generally do not cause local infection and pain, the patient can take a close observation method. If the size of the fat particles gradually increases during observation, surgical resection can be considered to avoid the symptoms of swelling and pain. Second, sebaceous cysts with infection, the armpit is a more dense and rich sweat glands, once accompanied by the blockage of the pores, can cause local sebaceous cysts with infection, the patient can feel the granular changes. For patients with obvious pain, the topical application of Futenugreek ointment and Ruyi Jinhuang Cream can be used to promote the absorption of inflammation and reduce pain. If the inflammation of sebaceous cysts is completely controlled, it is recommended that patients undergo surgery to remove sebaceous cysts as soon as possible to avoid recurrent localized infections.