<human>: I have had a lump on my collar bone for as long as I can remember, I am 17 as of now. Now the lump is getting bigger and now it is painful to the touch. The lump is about a half an inch and is located on my left collar bone. And when I touch it, it moves around. Im not sure what it is, can  you please help me?
<bot>: Hi! THANKS FOR YOUR query regarding the painful mobile long-standing lump on your left collar bone! Well, as per my experience on the final diagnosis or tissue diagnosis following biopsies of such lesions, I could consider following possibilities in your case:1. An infected skin cyst like sebaceous cyst, bronchial cyst, lymphatic cyst etc2. Inflamed lipoma, neurofibroma or dermatofibroma etc.3. Thyroid cysts like colloid cyst etc4. Acute on chronic lymphadenitis could be related to tuberculosisTherefore, you need a needle biopsy for the confirmation; please ask your doctor today!