How one can overcome problems he faces whenever he talks or touch to girls he secretes some fluids ?

when ever my friend xyz talks with the girls or remain in groups so when he comes in physical contact like normally girls touch yr body while talking so at that time he secretes some strange fluids from his and he is saying that he is very upset and it is happening all the times he talks with the girls. Also it is affecting his health. how can he overcome pls suggest