I have had this issue for quite some time (8-10 years) but always seemed too small for any consultation When I experience acute pain I tend to pass out and feel dizzy. By acute pain I mean getting hurt on veins or in the elbow/knee or deep prick from anything too sharp and in some cases at sight of blood. This is not very frequent and happens only when I experience extreme pain. Usually happens once in one or two years. Just wanted to know if there is something to be concerned about. (I am 20 year old male)