I Passed out because i pressed on my stomach. I was investigating a slight pressure on my right side that has been their for a few weeks. As i located the the irritation i suddenly got light headed and sweaty and passed out after a few seconds, no pain involved. A couple days later the pressure reappeared and i again investigated the location with only slight pressure and instantly got sweaty and light headed and almost passed out, wanting to be absolutely sure thats what caused it i pressed very firmly and became very sweaty, light headed and queazy attempted to go to the bathroom and was to weak and light headed to make it, the light headedness only retreated after i threw up 5-10 min later. Again still no pain involved, only slight pressure on my stomachs lower front right side.