Inverse psoriasis, which causes painful lesions on sensitive skin folds, can be hard to treat. Find out more about this type of psoriasis.

About ProShares Short S&P500 The investment seeks daily investment results that correspond to the inverse (-1x) of the daily performance of the S&P 500® Index.

Arthritis affects tens of millions of Americans. Get the facts on the different types of arthritis and find out how they’re diagnosed.

It's impossible to name all the possible fears that people can have, but here's a list of the most common and unique ones, including the fear of phobias, as well as treatment options.

Maslow’s hierarchy of needs is a model for understanding what motivates and fulfills humans. Learn more about this psychological model here.