In this article. When you have diarrhea, your bowel movements (stools) are loose and watery. Itâs very common and although it feels bad, it's usually not serious. It typically lasts two to three days, and if you need to treat it, there are over-the-counter medicines, which means they don't need a prescription.all your doctor immediately if you have: 1  Blood in your diarrhea or black, tarry stools. 2  A fever that is high (above 101 F) or that lasts more than 24 hours. 3  Diarrhea lasting longer than 2 days. 4  Nausea or vomiting that prevents you from drinking liquids to replace lost fluids. 5  Severe pain in your belly or rectum.
There are probably millions of volcanoes that have been active during the whole lifespan of the earth. During the past 10,000 years, there are about 1500 volcanoes on land that are known to have have been active, while the even larger number of submarine volcanoes is unknown.
As demonstrated in the world map below, most of the ~550 active volcanoes on earth are located along the margins of adjacent plates. World map showing plate boundaries (blue lines), the distribution of recent earthquakes (yellow dots) and active volcanoes (red triangles). Courtesy of NASA.