What Is The Treatment For Sunburn On The Legs?

about 2 years ago i got really bad sunburn on my legs, more so on my right leg than my left and my right leg swelled up really bad, well it went away. the swelling comes back now and then and usually only lasts a day then goes away. but now for four days my right leg has been swelling and is starting to become unfortable. it doesnt hurt just feels "funny". i am 26, female, 5'6, 160