Nousea In Morning

I am a skinny individual with weight of 51 ,height of 6 Feet. The main reason of this under weight is the nousea that I usually develop every time I tried to eat. Especially in the morning I always have severe kind of nousea. I tried to took motiliam, onset, maxlon, But of no use as all were helpful for the short time period. All of my tests TFT, CBC, LFT, RFT and ultarasound are clear. Please suggest me how can I take over this problem of nousea in the morning.