5. Staphylococcus:An infection caused by bacteria commonly found on the skin or in the nose. Staph can be spread from person to person and is very contagious. Staph can also cause food poisoning resulting in nausea, vomiting and stomach ache. In rare cases, staph infections can turn deadly if the bacteria invade deeper into the body or enters the bloodstream resulting in fever, joint and muscle pain.

Symptoms:

One may experience:

Pain areas: in the abdomen or skin

Skin: blister, boil, impetigo, rashes, or redness

Gastrointestinal: diarrhoea, nausea, or vomiting

Whole body: chills or fever

Also common: abscess, pus, or swelling