I sometimes get a weird pulsing sensation in the front of my brain, just above the right eyebrow area. This just starting occuring within the last year or two. It is not painful, nor is there any tingling and I don't feel faint or nauseous or anything at all, it's just a pulse type of feeling that only lasts a second or two. It doesn't happen a lot (probably 5-10 times a month max)

It actually stopped for several months (maybe 6+) and just recently start happening again every so often. What's strange is that I've noticed it pretty much only happens after I've been watching TV for awhile or staring at my computer screen doing work. Any advice or suggestion about what it might be? Could this be sign of a tumor or something similar?