My DS will be 3 in November. Very recently he's started biting when messing/overexcited/hyper playing. It's happened twice this weekend, once with my DH and once with me. It's really painful and I have no idea where it's come from?? Also starting last weekend (so again very recently) he's been biting his clothes (his collar or the corner of his jacket) so I feel they must be connected. It's never when he's cross or frustrated, it's always when he's really happily playing. Looking for advice on how to deal with it and also why on earth this might have started seemingly out of the blue! I'm really worried he'll do it at nursery or with his younger brother once he starts moving!