I am 17 years old, not sexually active. sometimes after clitoral masturbation, i see blood, even in the middle of cycle. should i see a gyno?

Can't be sure: Bleeding is usually a sign that you have scratched or torn some of the sensitive tissues in the area. If timing ties it to the event, you are likely opening or reopening injured tissue. Take it easy for a while and keep the area clean,it may stop and heal if you leave it alone.If it continues you need to have the area examined to see where the blood is coming from.