Hey. I've noticed that lately after my period, and I have no idea what causes it! Just thought i'd let you know so you don't feel weird ;)
i cant speak for you, cos your problem may be different, but for me, I just ignore it. I am certain it has nothing to do with infections - i've never had an infection. On one or two occasions it has actually taken weeks for the little tear to heal, but I just tell myself not to touch it, just let it heal itself. It's not even really a problem for me cos the only time it hurts is when im washing. Just be gentle with youself, particularly when you're washing or doing assorted naughty things :)
it might just go away in a while. I haven't noticed any of these tears for a few months now.