20 Warning Signs Of Cancer You Should Never Ignore!

20. Abnormalities in Vision

Double vision is a serious medical sign even if not cancer. There are many serious diseases that causes it, including diabetes, a weakening of the eye muscles, multiple sclerosis, an aneurysm, head injury, and cancer.

If you start having double or blurred vision, it could be a brain tumor behind the eye interfering with the optic nerve.