I noticed a lump on my right forehead/hairline area approximately 1-2" above the temple. It is very tender to touch. There is no discoloration or visible bug bite or lesion. I didn't hit my head or have any other trauma to that area. I have also had a mid to low grade headache simultaneously and at times, my right eyelid doesn't seem to want to open all the way. Other than tension and pain in my back and hips, I am a healthy, albeit overweight, person. Is this something to check out?