My Daughter Is Experiencing Tingling In Her Extremities. There Is

My daughter is experiencing tingling in her extremities. There is no "trigger" that she can identify. When this occurs, she is engaged in " normal" activities, such as shopping, driving, working on the computer, etc. She is not engaged in any particularly stressful or physical activities. When she experiences this "tingling" she then then experiences a "panic attack". Any ideas as to what is causing the "tingling" and subsequent "panic attacks"?