right ear turns red

Outside edge of  rightside of  my ear turns red,also feels hot and swells some,from time to time

[Vivek V Gurudutt, MD]

Your symptoms can be due to any number of things including but not limited to dermatitis, allergies (allergens, medications, foods, etc), irritation, infections (skin or cartilage), temperature, stress, trauma, autoimmune disorders.  If you have difficulty, get an evaluation by a physician.  Good luck.

[klanac]

That happens to my ear after using hairspray.