<s>[INST] Hi I ve had this for a few years now and it has left a grey scar and it keeps coming back in the same place it swells up into a lump and it either bursts on its own or when I squeeze it a thin browns yellow puss come out of it I m worried as it is on my groin on the crease of my leg and the scar just keeps getting darker and deeper but I don t know what it is. [/INST] Hi,greetings from HCM.from your description i think you may be suffering from inguinal lymphadenitis with abscess which if untreated it spontaneously bursts on its own and leave an ugly scar.you have to consult a surgeon and do a proper drainage of abscess with culture sensitivity of the pus and biopsy of the lymph node to check for a tuberculosis . </s>