My FIL and DH have this wobbly chin thing, think of when someone is really cold. It doesn't happen that often but it looks like maybe a nerve in the chin that is having a spasm/twitch. There is no control over it.
Now my dd and ds have the same thing, dd who is 4 has calmed down alot, it used to do it virtually all the time as a baby, ds has it quite often atm, he is 2.
The HV mentioned it the other day and seemed a little puzzled by it, and the GP mentioned it once when ds was a baby, at the time ds was having a reaction to his jabs and the doctor thought it was to do with that, when i mentions about FIL, DH and D he just looked at me funny...
Anyone know what on earth this is?