Psoriasis is a common skin condition where the skin develops areas that become thick covered with silvery scales. It is a common problem, and millions of people in the world have psoriasis. Psoriasis is considered a skin disease, but really it is the result of a disordered immune system.
The T-cells, a type of white blood cell, become over-stimulated. They then direct the skin to try and "heal" a non-existent injury. The skin reacts the same way it does when it has a fungus infection; it grows very fast, trying to "grow" the infection off the skin.
These areas become the reddened, inflamed, patches with white scale on them. Psoriasis tends to be worst in those with a disordered immune system for other reasons (cancer, AIDS or autoimmune disease).
Psoriasis areas are worsened by scratching and minor skin injuries or irritations. Psoriasis may itch or burn. It most often occurs over the elbows, knees, scalp, lower back, and palms or soles of the feet. The skin may split or crack in areas that bend.
Eczema in most cases, it is manageable. Atopic Dermatitis also called eczema is an itchy, red rash. It can appear all over the body.
Many people have it on their elbows or behind their knees. Babies often have eczema on the face, especially the cheeks and chin. They can also have it on the scalp, trunk (chest and back), and outer arms and legs. Children and adults tend to have eczema on the neck, wrists, and ankles, and in areas that bend, like the inner elbow and knee.
Generally, people with eczema suffer from dry, sensitive skin. Eczema is also known for its intense itch. The itch may be so bad that you scratch your skin until it bleeds, which can make your rash even worse, leading to even more inflammation and itching. This is called the itch-scratch cycle
Here are My TOP 12 TIPS for Living with Psoriasis & Eczema