It's a reddish pink oval on my neck. I think it's this:
Pityriasis Rosea

A harmless rash, pityriasis rosea usually begins with a single, scaly pink patch with a raised border. Days to weeks later, salmon-colored ovals appear on the arms, legs, back, chest, and abdomen, and sometimes the neck. Patches on the back may appear "Christmas tree" shaped. The rash, whose cause is unknown, usually doesn't itch, and often goes away in 6-8 weeks without treatment.

How long will it be before it actually goes away? I think I've had this before? Can this be a reoccurring skin condition?