question: Hi dr. My daughter is 13 years old. She fell and bump her head at the right side of her head and caused a concussion, It happened 1 and a half month back. They did an MRI and discovered an sist in the right para phangeal next to carotid area in the neck. Since then she become sicker. They did a lot of blood test. Her symptoms are fatigue, nausea,headaches,pain in legs, nosebleeding,low blood pressure,shortness of breath, sore throat. The bloodtest came back and results co2 level a little low, RBW little high, IgE VERY HIGH, IgG4 High. Please help!!