I have a headache everyday just above my ears, could this be a sign of a brain tumor ?

Constant headache.: There are many causes, one could be a brain tumor. Daily headache needs a good neurologic evaluation and probably an MRI.

More likely not: There are dozens of factors that contribute to or trigger headaches other than brain tumors. Issues involving sleep, nutrition, stress, allergies & others all contribute to haw you feel. Write down a list of all your symptoms, when they started & things you have done that aggravate or help. Then take this list with you during a visit to sort out the problem. Testing would be determined then.