<s>[INST] I have a small lump below my left ear just besides my jaw. It is always changing in size but its not getting bigger by 1 cm. It was there for long time already. No pain except when i keep on touching, pressing and doing massage on it. Please advise... Thanks so much!! [/INST] Hi, dairy have gone through your question. I can understand your concern. You may have either sebaceous cyst or post auricular lymph node enlargement due to some infection.  You should take course of antibiotics.  If it doesn't respond to treatment then go for excision biopsy and histopathological examination. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>