Bleeding after MASTURBATION

Well guys, I masturbate. I usually have 5-6 orgasms in one go. I get extremely horny before and during my ovulation period so when I masturbate those three or fours days then I see light bleeding with my orgasm . That's too less. But the blood looks like period blood but just a bit and sometimes it's a little more than that. This has been happening with me for years now. Is this a matter to be concerned about?

PS - if I masturbate once with the same amount of orgasms just for one day then there's no bleeding. That happens only when I masturbate daily during ovulation.