about a
pea-sized amount total and spread a very thin layer over both temples with one fingertip. For a sinus-style headache, you can also place a tiny amount on the skin just under the nostrils so the menthol vapors are easy to smell as you breathe. Sit upright for 10 to 15 minutes and let the cooling sensation settle in.
This can help because menthol and camphor create a cooling, mildly numbing effect that some people find soothing around the temples, while the strong vapor can make breathing feel
