Headache on the front, left side of my head.?

If you put your wrist on your left eyebrow, where your palm is, is where my head hurts. It hurts especially when I stand up. When i`m still the pain comes and goes but its not too severe as much as when i stand up. Ive been experiencing allergies for the first time ever and my nostrils are 60-70% blocked. Is this just a sinus headahce, or worse?