Skin diseases may be caused by allergies, irritants, genetics and problems with the immune system, according to the National Institute of Arthritis and Musculoskeletal and Skin Diseases.
These disorders may produce rashes, inflammation, itchiness or other skin changes. Some conditions may be genetic, but some are linked with lifestyle choices.
Treatments include medications, creams, ointments and lifestyle changes.
Two types of skin diseases are:
• Psoriasis, which causes red, scaly skin that may feel painful, swollen or hot. The cause is not fully understood, but it involves a mix of genetics and environmental factors. It is most common in adults, and it affects men and women equally.
• Rosacea, which causes reddened skin and pimples, usually on the face. It can also thicken the skin and cause eye problems. There is no cure for rosacea, but treatment can keep it under control. It is most common among middle-aged and older women, but it is more severe when contracted by men.
The National Institute of Arthritis and Musculoskeletal and Skin Diseases website has more information.