Psoriasis is an autoimmune condition that appears on the skin.
To diagnose psoriasis, a dermatologist will examine your skin, nails, and scalp for signs of this condition.
Your dermatologist will also ask if you have any:
Symptoms, such as itchy skin
Nail pain
Joint problems, such as pain and swelling or stiffness when you wake up
Blood relatives who have psoriasis
Recent changes in your life, such as an illness or increased stress
Dermoscopy is used for better diagnosis
Sometimes, a dermatologist will remove a small piece of skin. This is called a skin biopsy. By looking at the removed skin under a microscope, a doctor can confirm whether you have psoriasis
