resp. sir, i have been suffering from a numbr of diseases right frm my birth. m a 17 year old girl frm india. recently frm d last 2 years i hve been facing a vry weird problem. my legs feel lyk they r lyfless. my hands shake when evr i try to do sumthin also wen ever i get up frm bed or frm a chair sum 10-15 secs evrythin turns black n i cant see anything. i hve lost my strengths. in d last 2 years i hve been prone to a number of diseases. bt right now m fully fine. in my total span of lyf till now i had suffered 3 times chicken pox, 2 times typhoid, once jaundice, once pneumonia, gastritis in 2011, candidiasis in 2012 nd a sharp blow on my head wen i was just 6 months old(my mother told me) for 3 times till now i hve been on death bed bt still alive. once at the time of jaundice, secondly after dat blow n den at the tym of typhoid. can u plz tel me wat is d main reason behind these symptomes i suffer frm????