In preparation for ovulation, your hormones control the development of eggs in your ovaries and the preparation of the womb to receive a fertilized egg. About half way through your cycle, a single, ripe egg will break away from your ovary and travel through the fallopian tube to the uterus or womb. When the egg breaks free from the ovary, it may cause some small amount of bleeding and that blood can travel along through the tube and cause spotting. If the egg is fertilized, it will cause your hormones to retain the endometrial lining of the uterus where the egg will attach and begin growing a fetus. If the egg is not fertilized, different hormone levels will cause the lining to slough off, causing you to menstruate.
So, it is not unusual to bleed a little when you ovulate and is very normal for some women. I had spotting and even some pain when ovulating until I was around 35. It seems that after that it went away. If you find that you are bleeding much more than a "little bit" or if you run a fever or have great pain on one side or the other, do go to a gynecologist to have it checked out. Severe urinary tract infections can cause spotting and although it is pretty rare, sometimes a fertilized egg will plant inside the fallopian tube and begin to grow (ectopic pregnancy.) That is an emergency situation, but I believe what you are describing is normal "mittelschmertz" (middle pain) and spotting associated with ovulation.
So, it is not unusual to bleed a little when you ovulate and is very normal for some women. I had spotting and even some pain when ovulating until I was around 35. It seems that after that it went away. If you find that you are bleeding much more than a "little bit" or if you run a fever or have great pain on one side or the other, do go to a gynecologist to have it checked out. Severe urinary tract infections can cause spotting and although it is pretty rare, sometimes a fertilized egg will plant inside the fallopian tube and begin to grow (ectopic pregnancy.) That is an emergency situation, but I believe what you are describing is normal "mittelschmertz" (middle pain) and spotting associated with ovulation.