I thought my 15 month old was coming out in chicken pox. He started with what looked like a bad nappy rash on his bum then a day later he has blisters all over his feet slightly going up on his leg. Woken up this morning and it hasn’t spread anywhere just the occasional blister on his hand. He won’t drink much of his bottle and is generally quite whingy but happy at times. Any advice? Do I take him to the doctors or just let it run it’s course?