Dengue with fever and joint pain for 4 days, and a platelet count of 1,00,000, you need close monitoring. This count is not dangerously low yet. In dengue, platelets often drop for a few days before they start to recover, so it is important to watch the trend rather than focus on a single number. There is no specific antiviral medicine for dengue. Only take fever and pain medicines if your doctor recommends them. Avoid medicines like ibuprofen or aspirin, as they can raise the risk of bleeding. Paracetamol is usually safer for fever, but use it only as your doctor advises. Supportive care is key. Drink plenty of fluids such as water, ORS, coconut water, and soups to stay hydrated. Get plenty of rest and keep track of your temperature and symptoms. Repeat platelet counts as your doctor suggests to monitor any changes. Look out for warning signs like bleeding gums, nosebleeds, severe stomach pain, ongoing vomiting, extreme weakness, or a sudden drop in platelets. If you notice any of these, get medical help right away. Staying hydrated and following up regularly are the most important steps for a safe recovery.