hello doctor. My case may be special . for years i have been having sliva wetting my pillow ,yellowish color,very bad to smell, i have to change my pillow case daily; it happens only at night when im sleeping. i always find traces of it on the pillow with intolerable bad smell. i still do not know the origin of it, . thank you ,doctor , for telling me about it. this is my e mail : YYYY@YYYY im 53, 90 kilos,1m,75 tall, i have seen many doctors specialists of the digestive system because i thought the saliva of that kind could have been the result of ill digestion, but in vain.