I have health issue. Hand very painful.

Hello ,My name is Anil Kumar. My problem...is when am go to out side I mean in sunlight then I did get my left side leg and hand is painful and feeled very weakness in summer I did get this type if problem very high and my mind is also not working at that time, I meaning did feel like very  hurry burry. If I took food in that time but I feel like very weakness..am doing as a medical officer job so I do feiled work but I didnot work well.if I drive a car in summer or in sunlight then I feel very weakness and tried and my left side leg and hand very painful. Am suffering from last two years already I consult neurologist but no result pls doctors any one solve my problem.i feel very uncomfortable in functions or partys and I not enjoyed that moments at summer..pls solve my problem..