 [ Symptoms ] what is this big bump on my arm that keeps getting more and more puss  it is a large red bump that keeps getting more puss after i pop it and remove the puss [ Disease ] sorry you are experiencing this it sounds unpleasant unfortunately it is impossible to say what is going on without a physical examination it is possible this is a boil in which case i would advise not popping it which can allow bacteria to enter the wound and further infect your arm but rather putting warm not hot  moist compresses on it to draw out the pus if you are running a fever or have any of these other health conditions you should see a doctor heart murmur diabetes use of an oral or inhaled corticosteroid such as prednisone budesonide symbicort or fluticasone advair or if the bump does not heal up on its own with 10 14 days i wish you the best of luck with this