"i just got skyla yesterday, and i took 800 mg motrin before and after. the insertion was the most painful experience i&#039;ve ever experienced. (but keep in mind i&#039;m 16 and have had no kids lol, also it is different for everyone i guess) after i got it inserted which only took about 3-5 minutes i had the worst cramps ever, my knees and my back also started hurting. i cried because the cramps were so painful. but today (which is the day after) i&#039;m not feeling any cramps or hurting any where. i don&#039;t even feel it now."