My son is 20 months old. About 5 months ago his right leg appeared to be giving out on him out of nowhere. i took him to the ER and they took x-rays and examined him and saw nothing out of the ordinary, but said if things continued to go to a orthopedic doctor. Well about a month later he was doing the same thing again taking a few steps and his leg would give out on him. I made him an appointment with thte othopedic doctor and they again took more x-rays examined him and watched him walk (at the time i took him to the doctor he was walking normal again) they came to conclusion that everythign looked fine, but said if things would contiue i would need to take him to a neurologist. (this scares me) I do not understand because his symptoms come and go and there is no pain while this goes on. Last night he started limping and this morning he was still limping. I called his doctor and asked them what i should do and he wants to see him tuesday, but i want to know whats going on now. Does anyone have any ideas of what it may be?