 [ Symptoms ] i have a itchy rash that comes and goes what could be causing this  the rash appears in different areas of my body for an example a rash showed up on my wrist and stayed a while and went away later the same day it appeared on my stomach and then on my thighs etc its itchy while it is present at one point my hands first turned red and then start to itch really bad to the point i had to wash my hands repeatedly i work in the medical field so i wash my hands a million times a day what could be causing this reaction [ Disease ] if you think your dry mouth is caused by certain medication you are taking talk to your doctor he or she may adjust the dose you are taking or switch you to a different drug that does not cause dry mouth in addition an oral rinse to restore mouth moisture may be prescribed if that does not help a medication that stimulates saliva production called salagen may be prescribed other steps you can take that may help improve saliva flow include sucking on sugar free candy or chewing sugar free gum drinking plenty of water to help keep your mouth moist protecting your teeth by brushing with a fluoride toothpaste using a fluoride rinse and visiting your dentist regularly breathing through your nose not your mouth as much as possible using a room vaporizer to add moisture to the bedroom air using an over the counter artificial saliva substitute