It really depends on what is causing the bleeding and what type of sex you are having.
I don’t know much about your situation but I will assume you are a woman who is having vaginal sex with a man.
There are a few things that can cause the bleeding. I will list some of the common one’s.
Just starting your period or if it has just finished.
If there is not enough lube or sex goes on for a long time, the friction can cause you to bleed.
It is possible to get some breakthrough bleeding if you are taking birth control pills, which can cause spotting.
Having a sexually transmitted infection (STI) like chlamydia can cause you to bleed during sex.
I would recommend going to see a health care professional to discuss your situation with them. They would be able to ask you specific questions to see if it a concern or not.
Let us know if you help finding a clinic.
Please leave a comment to let us know if this answers your question or if you need more information.
For other readers, please feel free to leave a comment, or let us know if this was helpful.