While washing my hair & cleaning behind my right ear i noticed the back of my ear hurts, no sores present. could this be signs of an ear infection?

Ear Tenderness: Pain in bony part can be due to many causes including too tight glasses, bluetooth or ear buds not fitting properly. Sometimes pain can travel from the eardrum or canal- this is called referred pain-that can be due to inflammation, infection or congestion. The bony area also called mastoid process. This area can become tender w ear infection spreading to this see. Go to doctor if pain persists.