<s>[INST] Two days ago I noticed a red lump on the outer portion of my right arm. Puls and blood could be extracted however it returns to its egg shaped size. It is painful and I have now developed a rash passed my bicep. Hot compresses do not work. Pus and blood can extracted from it however it returns to its normal size. It is egg shaped under my arm. I have tried antibiotic ointment and hot compresses... [/INST] Hi, It looks like an abscess that could have been a progression from a hair follicle infection. It is due to bacterial infection where the bacteria seeps into the hair roots and cause infection there. As it is not being drained completely it is the cause for refilling it with pus and blood. So my suggestion is to consult an Emergency room and get evaluated. Incision and drainage can be done followed by a course of antibiotics like Sulphamethoxazole and Trimethoprim. Keep the area clean and dry and do not touch it again and again to avoid spread of infection. Hope I have answered your query. Let me know if I can assist you further. </s>