The incubation period of influenza is usually two days but can range from one to four days. What are the symptoms of influenza? Typical influenza disease is characterized by abrupt onset of fever, aching muscles, sore throat, and non-productive cough. Additional symptoms may include runny nose, headache, a burning sensation in the chest, and eye pain and sensitivity to light. Typical influenza disease does not occur in every infected person.
ACTION: If sleeping on your left side doesnât help, and heartburn and indigestion are still proving a problem, prop up the head of your bed slightly, so that the upper body is higher than the stomach. This can help reduce acid reflux when sleeping, as gravity keeps the acid in the stomach.
Best Answer: don't really have a fact type answer but I always sleep on my side's (left or right) I have never been able to fall asleep on my stomach or back, but I've always had a good digestive system, never had any problems.