K.C.
My 5 year old daughter gets them about 1 to 2 times a month. We also have no clue why but are thinking that it is when she gets worn down. It seems that she gets them most when she has had a busy week and is sleepy. It is weird they almost act like they are moving all over her it will be in one spot then move to another. We got a lotion from the Dr thinking that would help but the only thing that seems to take them away is benadryl (Spelling Sorry). Good Luck