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.
Geologists classify volcanoes into three distinct groups: dormant, extinct and active volcanoes. Dormant volcanoes havenât erupted in a long time, but they could again; extinct volcanoes have erupted for thousands of years and might be dead. Active volcanoes, on the other hand, erupted recently, and theyâre probably going to erupt again soon. Strombolian eruption. There are approximately 500 active volcanoes in the world today, not including those underneath the oceans. In fact, as you read these words, there are probably 20 volcanoes erupting right now.