D.D.
could be the teeth ..do u ever try hugging it out? my son is such a happy little guy..he's 4 now..but sometimes a tantrum rears it's head and then i say.."hug" ..we hug and i hold him and its all over..if its something really bad we hug then talk it out..i am lucky to have found hugging it out b/c i watch my friend's kids be cranky and they just don't want to do hug it out..so they have little cranky people and mine gets over it instantly w/ some loving..and moves on ...now he tells me to hug him if i get upset..