Hikers said they experienced vomiting, diarrhea, and fever symptoms while visiting the Grand Canyon. Health officials say the cause remains unknown.

A cruise ship likely carrying thousands of passengers was stuck down by a potentially deadly vomiting bug—with holidaymakers "dropping like flies" with the infection, according to one witness.

Vomiting in dogs is very common, and it can be a sign of lots of things, from mild to serious. Some dogs will vomit once and then seem fine afterward, while others will vomit regularly. Some dogs will ...

Illnesses like stomach flu can cause temporary weight loss due to vomiting and diarrhea. Most weight loss from being sick is "water weight" and will return when you eat and drink again. Signs of ...