The inflammatory skin disease psoriasis affects more than 3 percent of the adult population in the United States—that’s more than 7.5 million people. Public awareness is increasing, but there are still many misconceptions that need to be cleared up to remove the stigma and make life a little easier for people with psoriasis.

Here are some of the common psoriasis myths that need to be debunked. (Feel free to share the facts with family and friends who should know the truth.)

Myth #1: Psoriasis is caused by poor hygiene.

Because psoriasis is a visible disease that manifests as dry, scaly plaques on the skin, many people think poor hygiene is a factor. But that couldn’t be further from the truth.