Itchy red bump disease, also known as papular dermatitis, is characterized by an itchy rash and swollen, reddened skin that may flake off or ooze, reports the Mayo Clinic. There are several types of dermatitis.
One of the most common types of dermatitis is eczema. It occurs most often where the skin flexes, such as behind the knee and in the elbow, according to the Mayo Clinic. This disease generally begins in infancy and can ooze when scratched. Another common type of dermatitis is contact dermatitis which occurs when the skin touches something that irritates it or cause an allergic reaction, such as poison ivy. Contact dermatitis can burn or sting and blisters can develop. Seborrheic dermatitis causes a scaly red rash and dandruff on oily parts of the body.
Nummular dermatitis is characterized by large, circular shaped red bumps that are on the arms, legs and torso. It is more common in men and usually appears between the ages of 55 and 65, states WebMD. Poor circulation in the legs causes stasis dermatitis. This happens to people who suffer from varicose veins, congestive heart failure or other illnesses that cause leg swelling. The swelling causes irritated redness around the ankles.