Kamsymfyse is a symfyse (part of the pubic bone) with a sharp edge, which can cause pain during intercourse.
When you touch your mons (the protruding part of your genitals that is covered with hair) you can feel the symfyse. You can also feel it if when you insert you’re your finger in your vagina and press it forward, towards your belly button.
The symfyse does not always have the same size. If it is wide the vagina is located lower, more towards the back. If the symfyse is both wide and sharp intercourse can be painful. The thin and sensitive tissue around the vaginal opening gets easily irritated.
If you have sex in the missionary position the best solution is pulling up your legs and putting a flat pillow under your bottom, tilting your pelvis. Positions in which the vagina is entered from the back may also solve the problem. You may also use a water-based lubricant with intercourse.