my 3 year old daughter starting crying about an hour ago and scratching her legs and arms. Her left arm is bright red with a few scattered welts and is hot to touch. Her ankles are red with large raised welts. She does not have any on her abdomen, chest or back. She complains of itching. She had not eaten anything out of the ordinary. I just checked her and she has large red raised splotches going up her legs front and back. she does not have any difficulty breathing. It it is creeping up from her anles up to her thighs front and bACK. SHOULD I GO TO THE ER?