###Human: What is the reason for stabbing pain on my back? ###Assistant: Hi. Most likely you are suffering from gastroenteritis. It is an intestinal infection marked by diarrhea, cramps, nausea, vomiting, and fever. However, it is not necessary that all symptoms are there in a single patient. Depending on the cause, viral gastroenteritis symptoms may appear within one to three days after you are infected and can range from mild to severe. Symptoms usually last just a day or two, but occasionally they may persist as long as 10 days. Treatment includes drinking plenty of fluids to avoid dehydration. You need to drink more than usual to replace the fluids lost from vomiting and diarrhea. Water is best, but you could also try fruit juice and soup. Take Paracetamol for any fever or aches and pains. Get plenty of rest. If you feel like eating, try small amounts of plain foods, such as soup, rice, pasta, and bread. Use special rehydration drinks made from sachets electrolyte solution to maintain depleted electrolyte levels in serum. Take anti-vomiting medication (such as Zofran 4 mg twice) and antidiarrhoeal medication (such as Loperamide up to 16 mg a day). It is better to take three days antibiotic and anti-protozoal course. Tablet Ofloxacin 200 mg twice a day, tablet Metronidazole 400 mg twice daily.