hello doctor, my mother is suffering from dizziness along with vomiting sensation since one month. this problem is severe when she stands up and also while sitting. she doesn t experience this problem while she is lying on the bed. all the blood and urine tests of HB, kidney function, thyroid , BP and sugar levels are normal. what may be the problem we are understanding, we are very much worried about this problem. so i am requesting you to guide me to get rid of this problem as early as possible. i will be waiting for ur reply. thank u,