Hello, my 13 year old has a rash (red like pin pricks and raised red bumps) that started this morning on both legs, it has moved up to his thighs. He is having a hard time walking and standing and says his legs are aching. He is just recovering from what we thought might have been the flu, (headache, vomiting, coughing, stiff neck). He says the pain in his legs is getting worse. Should we take him to the ER?