HI, thanks for using healthcare magic
can be caused by viruses or bacteria. It is most commonly caused by viruses. Viral illnesses can sometimes be associated with rash
and may be the reason for the rash you have at this moment. The rash would generally resolve soon after or before the illness resolves.
In terms of rehydration, you are right in assuming this is the most important aspect of treatment of gastroenteritis.
You can use small amounts of fluids initially because the stomach may still be irritated or inflammed. Try about a 1 tbs first, every few minutes for an hour, if you tolerate this then you can use more.
If you use fluids for a few hours (about 4) and there are no episodes of vomiting
, then you may want to move on to dry foods.
I hope this helps