my daughter started doing the same thing around 1 yr, and is still doing this (just not as much) at 1 1/2. it started with her bashing her head into anything and everything, especially when in the crib (which caused many bruises and fat/split lips). we had to pad the railing and that stopped after about 2-3 months. she still slams her head into the floor, furniture, and (most painful) US! i swear it feels like my shoulders are broken from her slamming her head into me. she's almost broken a few noses. it gets bad. the WORST thing to do is try to reason with her, because it just makes it worse...also no laughing! i know it sounds stupid to say, but my MIL laugh EVERY time my daughter had a tantrum, and it only makes it worse (and i'll admit maybe 3 times outta the 100 or more she's had, i've had to walk out of the room, or cover my face to hide my laughter). all depending on the situation, i either ignore her, redirect her to something else, or just pick her up and put her in her crib. usually (lately) she throws the tantrums when she's starting to get tired. if you notice that, just put him in his crib for some "me-time" or down for a nap...just because she's starting to get tired, doesn't mean she's ready to go down, she just needs to rest and maybe watch some tv. at this age, MOST of the tantrums are related to frustration, and the easiest way to go around that is to redirect them to something else. i hope some of this helps. good luck, and try to be patient.