Sore Muscles
Having some degree of soreness or pain in several muscle groups can also be a sign of stomach flu. This is also called myositis, which is often caused by viral infections such as gastroenteritis. While myositis can have an effect on different muscles over the body, your legs and arms are mostly affected. They are mainly caused by damages to the muscles’ fibers, making it challenging to hold or move stuff. You might also experience generalized weakness, so make sure to take precautions when doing daily activities. [7]
