diaper rash

So my daughter got her first diaper rash at 6 months. I blammed on on the introduction of carrots but she also broke her bottom 2 teeth at the exact same time. She got a rash for the second time today (8 months) and I'm wondering if she's about to cut another tooth or could it be from letting her try strawberries. it was a Gerber organic pouch with strawberries, pears, and peaches (wasn't even pink so couldnt have been a lot) and she had maybe 1 tablespoon 3 days in a row before the rash came. She's had pears and peaches and was fine. any ideas?!!!