<s>[INST] I had an infected Montgomery gland a few months ago and I regularly have to drain it because it becomes too full of puss like fluid. I went to squeeze it a few days ago and it started bleeding. Then today I squeezed it again and a brown almost black fluid came out. What could this be? [/INST] Dear user you had bacterial infection of Montgomery gland or breast abscess ...in this case sincerely you should not squeeze it...squeezing is contraindicated in breast abscess or infection as it will lead to spread of infection in the tissues and get worse then....you need to take appropriate antibiotic for the underlying infection causes pus and bloody discharge...if you take the appropriate antibiotic and bacterial infection rolled out then pus and bloody discharge will end, and you will feel improvement .you need not to carry about that as the cause is determined and just treatment of the cause will end that all.....but please don't squeeze it again as it will be worse after squeezing .....you should refer to specialist to treat this infection with simple antibiotics such as amoxicillin and will give good results.......wish you healthy life </s>