<s>[INST] I have a knot that has came up on the back of my neck. I had an ultrasound an they said it was a Hypoechoic focus on or in the Lympnode and now want me to have a catscan. Other people say they have a knot and it s nothing to worry about. Some days it really bothers me some days it doesn t. Any ideas if I should just wait till it grows bigger or would that be a bad idea? [/INST] Hi Dear, Welcome to Chat Doctor. Understanding your concern. As per your query you have growing not on back of neck. Well there can be many reasons for symptoms you mention in query like infected Boil, Carbuncle, reactive hyperplasia, tuberculosis or lymphoma. Do not try to even touch or pinch the area as can cause more aggravation of the problem and spread of the infection. This area is quite common to get infected very easily because of sweating and high bacterial proliferation. Consult dermatologist for proper examination. Doctor may check tenderness and consistency, order ultrasound and take sample for lab test. Doctor may prescribe antibiotics like azithromycin along with anti-inflammatory. Doctor may also recommend surgical excision. Hope your concern has been resolved. Get Well Soon. Best Wishes, </s>