My 10 year old son suddenly in the past two weeks has started throwing his head back in what looks like a twitch , stating he is uncomfortable but without a great description. He is also complaining of twitching in his arms and to a lesser degree his legs and recently if you hold his arms in the biceps area you can feel both arms twitching involuntarily. He had a blow to the back of his head a couple of weeks ago which his pediatrician dxd as a probable mild concussion . He has no psychiatric history but is probably a bit on the anxious side, but my gut tells me this is not a psychosomatic symptom. The question is whether to take him to a pediatric neurologist and whether we have anything to worry about. He is basically a healthy kid.