The New York University Langone Medical Center, on the other hand, reports no marked increase in blood sugar levels in diabetics. As a precaution, however, you should discuss fish oil supplements with your health care provider, if you have diabetes. If you're already taking fish oil supplements, keep a close watch on how your blood sugar levels vary.
Another condition that can cause headache above left eye is glaucoma. This condition is due to the build-up of pressure within the left eye that causes damage to the optic nerve, destroying peripheral vision and leading to blindness. Any infections or tumor in the left eye or brain can cause pain around the eye.
6 Daily twitching eyelid on left side with headache over eye that comes and goes. Sometimes neck pain or pain on back of head also. Eye is dry also. No simple answer: The most common cause of achy pain around the eye that i see, comes from irritation of some nerves in the upper neck near the base of the skull.