<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a large mole on my stomach and also one on my belly button I have had since i was born. I have noticed the past few months a dark spot has toughened on the large mole on my stomach. I am experiencing unexplained vomiting, stomach pains and headaches. I am not sexually active. Should i get this checked?  <response>: HI, thanks for using Chat Doctor If you have noticed changes in the mole then it would be best to have it assessed. It may not be anything significant, but your dermatologist would be the best person to determine this. In terms of the vomiting, abdominal pain and headaches, these are not likely related to the changes in the mole. Persistent vomiting and abdominal pain may be due to different causes such as: 1HERD- reflux disease2obstruction in the bowel3gall bladder disease4infection5side effect of medication6alcohol use7kidney disease8high calcium levels9vertigo10mass in brain11food intoleranceYour doctor can assess you and determine the most likely cause. I hope this helps 