Both of these illnesses are upper respiratory infections, meaning they involve your nose, throat, and lungs. Viruses cause both colds and flu by increasing inflammation of the membranes in the nose and throat.

Diarrha is caused by the contaminated water with bacteria and other micro-organisms. This can also caused by the viral infections as well as food intolerances.

The cause of a headache is often elusive. Although it may seem that your head is pounding for no reason, there is always an explanation for pain. To find out the cause of your headaches, keep a log. Write down the date and time each headache starts and stops, the location of the pain, the nature and severity of the pain, and any factors that seem to trigger the headaches (food, stress, menstrual cycle, medicine, etc.).

It’s natural to have gas in your digestive tract, and to pass gas regularly. In fact, everyone passes gas at least 12 times a day, which is a combination of oxygen, hydrogen, nitrogen, carbon dioxide, and methane. The unpleasant odor of flatus is cause by gases (e.g. hydrogen sulfide) produced by the bacteria in the large intestine. Even though it’s natural to have gas in your digestive tract, excessive gas can cause intense, temporary pain. People who suffer discomfort from gas in the intestine report abdominal bloating, flatulence, and jabbing pains or cramps in the abdomen. Intestinal gas can mimic the pain associated with real illnesses, like gallbladder disease, heart disease, and appendicitis, but be aware that it can also signal other illnesses, such as stomach flu or food poisoning.