Understanding Plaque Psoriasis
Plaque psoriasis is a chronic autoimmune disease that causes rapid growth of skin cells, leading to the formation of thick, red, and scaly plaques on the skin. These plaques are often itchy and may be painful, especially when they crack and bleed. Plaque psoriasis commonly affects areas such as the elbows, knees, scalp, and lower back. It can also appear on the nails, causing pitting, ridges, and discoloration.
Distinguishing Features of Plaque Psoriasis
Plaque psoriasis is characterized by well-defined, raised patches of red, inflamed skin covered with silvery scales. The plaques are often symmetrical, appearing on both sides of the body. They can vary in size and shape, with some plaques merging to form larger lesions. The skin around the plaques may be dry and cracked, leading to bleeding and discomfort.
Key Differences Between Plaque Psoriasis and Other Skin Conditions
Eczema (atopic dermatitis) often presents with itchy, inflamed skin that may ooze or crust. It tends to affect flexural areas like the creases of elbows and knees. Seborrheic dermatitis is characterized by greasy, yellowish scales on the scalp, face, or torso. It can also affect the eyebrows and sides of the nose. Ringworm (tinea corporis) appears as red, circular patches with raised edges and a clear center. It is caused by a fungal infection and is contagious. Psoriatic arthritis is a form of arthritis that affects some people with psoriasis, causing joint pain, swelling, and stiffness.