Among the most effective ways to get rid of phlegm is to apply a warm compress to the face, particularly for those who have recently been sick. This compress could be a damp washcloth that has been warmed in the water. Warm compresses can help people with sinus headaches brought on by phlegm accumulation by relieving their pain and restoring moisture to their nose and throat. The phlegm in a person's system should thin out when the throat and nose get the right amount of moisture, which lessens the phlegm's negative effects.

The water used to generate the warm compress must be no hotter than 105 degrees Fahrenheit for children and 120 degrees Fahrenheit for adults. While the compress is placed over their face, people can also gently massage the area, which should help with their headache. For fifteen to thirty minutes, they should leave the compress on their face. To make sure the compress stays warm, they might need to run it under warm water once every five minutes.