Whether it's a mild stomach ache, sharp pain, or stomach cramps, abdominal pain can have numerous causes. Some of the more common causes include: 1  Indigestion.2  Constipation. 3  Stomach virus. 4  Menstrual cramps. 5  Irritable bowel syndrome (IBS).hether it's a mild stomach ache, sharp pain, or stomach cramps, abdominal pain can have numerous causes. Some of the more common causes include: 1  Indigestion.
A pink eye infection can occur when the eyes are rubbed with dirty handsâtypically spreading the bacteria and germs from an allergy or influenza infection into the eyes or by using dirty contact lenses. Here are the nine most common itchy-scratchy symptoms of pink eyeâ¦.
1 Influenza (flu) A and B viruses are the most common causes in adults. 2  Respiratory syncytial virus, or RSV, is more common in infants and children than in adults. 3  Others include coronaviruses, rhinoviruses, parainfluenza viruses, and adenoviruses, which can also cause pinkeye.