Hello Its Me Dharmakar From Nepal ,age 28 .I Have

Hello Its me Dharmakar from Nepal ,age 28 .I have a problem of coldness in the body ,While taking about my past history Last 2 n half years back In that time i have a problem of Vitamin D at that time i took supplement ,eating egg etc so its cure but completely i'm not well .These day when i take bath ,going swimming or somehow sitting in cold type of place it affect in my muscular loose and fatigue .but when i sit in hot place its good whats the reason behind these .So how can i cure from all these things ? Does its affect of vitamin d again in my body whats the reason .