Adult Skin Problems Slideshow Quiz: Is Ringworm Contagious? Gallery of Skin Problems and Image Collection Ecchymosis: Nonraised skin discoloration caused by the escape of blood into the tissues from ruptured blood vessels. Ecchymoses can occur in mucous membranes (for example, in the mouth). From Skin Problems and Treatments Resources Could This Red Bump Be Skin Cancer?Skin Care for PsoriasisAll About Psoriatic Arthritis Featured Centers When Prostate Cancer SpreadsEssential Tips to Manage DiabetesWhat Is Cystic Fibrosis? What Causes It? Health Solutions From Our Sponsors Kept Your Wisdom Teeth? Therapy at Home?