 [ Symptoms ] hi i have a 15 year old son that has a lump in his armpit could this be lymphoma [ Disease ] this is a hard question to answer because there is not enough information let me give you some general guidance if you friend is rash came on suddenly and she is experiencing a fever she should phone not go to an urgent care center right away for further evaluation sometimes a rash like you describe can indicate a serious infection if your friend is bumps have been slowly coming on over time and she is not having any flu like symptoms then she should see a health care provider to evaluate what might be causing this rash many things can cause the symptoms you describe including acne only a health care provider can say for certain what is going on and this evaluation needs to be done in person hope this helps