there are any reasons which may explain your painful periods. most of these can be easily treated and it is a good idea to discuss your options with your doctor. this is a common problem, and the possibilities include primary dysmenhorrea, endometriosis
, and many more. I know it might sound scary but the majorit of the time these issues are mild and are easily treated, so don't worry too much about it, just see your doctor so you can feel better and fix the problem. please let me know if you need any more information.