How long do teething poos usually hang around for? Is everything supposed to go back to normal when the tooth comes through? Kynan's had diarrhoea for a couple of weeks now and I thought it was either something new that he ate or teething. For probably just over a week I put him back on basic foods that I knew he'd never had a reaction to and for maybe half a day it looked like there may have been the slightest improvement but it must have been a coincidence. So I figured it must be teething but his 2nd tooth has been well and truly through for some days now and there's been no change. Should I take him to see the GP? I'm a bit worried about him getting dehydrated...