Hello, thanks for helping. My sister suddenly feels unwell randomly with it had happened twice now once at home an once on the underground train, these are her symptoms when feeling unwell in order of the moment, pressure in the right ear, loss of feeling in right eye, dizziness, tingling in the roof of the mouth, legs go numb an weak along with arm,heart races, out of breath difficulty breathing. The 1st time we called an ambulance because she thought she was going to die having never feelin like that before. We went to a hospital an a doc had told us it was the result of stress a type of panic/anxiety attack. Recently she had the second episode on a the underground train an suffered all of those symptoms but through breathing with her hands acting like a paper bag she was able ride the wave an after time to control the other symptoms but still felt groggy throughout the rest of the evening an night with sum unbalance and dizziness. Thank u for any insight u can shed , LLJL