<human>: Hi, my name is Tammy I have this lump under my arm its not sore but tonight I decided just to try and push on it harder and when I did dark blood and white pus came out of it..my arm has been aching all week just like a toothache..I wanted to see if you thought you would know what it maybe..thanks so much!
<bot>: Hello! Thank you for the query. According to your description most likely you have an abscess under your arm. In this location it usually appears as a result of shaving. Due to infection, puss accumulates what leads to painful lump creation. Such lump if left without medical attention can lead to serious infection. That is why I suggest you to consult surgeon as soon as possible. The lump should be incised and pus Chat Doctor. Hope this will help. Regards.