In life, if you take a bath or unintentionally find a lump on your body, I hope the following knowledge, can help you. If the lump is very round and can be pushed around, it is mostly benign and should be observed regularly, if you are not sure, you can go to the general surgery department. If the lump is soft, the boundary is obvious and does not grow for a long time, it may be benign, if it is hard, grows slowly and has fever, wasting and other physical changes, be alert to the possibility of malignancy such as lymphoma or metastasis, and go to the hospital for general surgery in time. 3.If a lump grows on top of the neck, there are more possibilities: a. If the lump grows under the chin, you should go to a meeting to see if there is any inflammation of the oral cavity and gums recently, so you can go to the stomatology department and do oral examination to clarify if there is any problem in the oral cavity or oropharynx; b. If a lump grows on the upper part of the neck, it grows gradually and becomes very tough or hard, you should go to the ear, nose and throat department in time to rule out any tumor of the head and neck. c. If a lump grows in the lower part of the neck or above the collarbone, go to the outpatient clinic for chest CT and gastroscopy to exclude esophageal cancer and upper lung cancer; d. If a lump grows in the neck and there is fever and wasting, be alert to lymphoma; e. If a lump grows in the neck and the thyroid gland is enlarged, be alert to the possibility of thyroid cancer; f. If a string of lymph nodes grows in the back half of the neck, be alert to the possibility of thyroid cancer; g. If a lump grows in the back half of the neck, be alert to the possibility of lymphoma. f. If a string of lymph nodes grows in the back half of the neck and there is pressure pain, you can see if there is oral inflammation or cold, you can try to take anti-inflammatory drugs for a week, if the bag shrinks, it may be lymphadenitis is more likely, you can observe dynamically, you can consult a doctor if you are not sure.