If you have a high fever of 39 degrees Celsius that doesn't go away, here are some steps you can take. First, take fever-reducing medications like acetaminophen or ibuprofen as directed. Drink plenty of fluids to stay hydrated. Use cool compresses on your forehead, neck, and armpits. Try to rest in a comfortable environment. If the fever persists for a long time or is accompanied by other severe symptoms like difficulty breathing, severe headache, or confusion, seek medical attention immediately. Your doctor can determine the cause of the fever and provide appropriate treatment. ????