I use monthly contact lenses Irisian Toric which are great but recently I've had problems after taking them out at night. Literally after I take them out my eyes sting & water to the point I have to close them for about five minutes as it gets so painful. The stinging doesn't completely go after that & my eyes continue to weep. When I put my lenses back in the morning they are fine. It's getting to the point that I'm anxious about taking them out at night but I don't want to not use them as they are correcting my astigmatism very well.
This is usually caused by your eye being too dry. Try wearing them a little less and removing them earlier in the evening. Also insert some lubricating eye drops a few minutes before you take them out. Put some in again as soon as you take your lenses out. Make sure the drops are made specifically for use whilst wearing lenses (your optician should have them in stock). You can also use them during the day if your eyes feel dry. I think this will help but if not you will need to see your practitioner for a contact lens checkup.