"i used yaz over a year. after a while i started to get random sudden pains in my arms and legs. once my finger got clogged. i could even see blue spot under skin and my fingertip went white and numb. but luckily it went away. but the worst was my knees started to hurt a lot, doctors didn&acute;t know why. i coulnd&acute;t bend my knees or walk without pain. it lasted about two months. and then i assumed it was because of the pills. i quit yaz and after some time pain was gone, also i haven&acute;t had any random pain attack in my arms or legs. quality of life improved dramatically. haven&acute;t had courage to use any birth control pill after that."