How do you get rid of a tension headache without taking over the counter or prescription medication?

-i always get tension headaches icy hot seems to work but i'm going for a clinical study soon and can't take any medication over the counter or prescription.

Does anyone know some natural remedy's that will get rid of the tension headache?Yes using your own hands to massage the back portion of your neck area. Use a circulating motion using your left and right back section underneath the earlobes. Be sure to massage the back portion circularly while lying in a bench without any cushions. Your body should be straight. While doing this you will feel that as you massage that area the skin section deepens, you can feel that it slowly relieves tension headaches as you do this for 15 to 30 minutes. This is one effective way without taking OTC medicines.Drinking tea and resting your mind ( zone out) usually works