Psoriasis and eczema are both chronic skin conditions, but they differ in several key aspects:

1. Appearance:
Psoriasis: Often presents as thick, red patches of skin covered with silvery-white scales. These plaques can be well-defined and appear on the scalp, elbows, knees, and lower back.
Eczema (Atopic Dermatitis): Usually appears as red, inflamed, and itchy patches. The skin may also be dry, cracked, and rough, often seen on the inside of elbows, behind knees, and on the face, especially in children. It is less scaly compared to psoriasis.

2. Itchiness:
Psoriasis: Itchiness can vary, but it’s not always as intense as in eczema. In some cases, psoriasis can also cause a burning or stinging sensation.
Eczema: Itchiness is a prominent symptom and can be very intense, often leading to scratching that can worsen the condition.

3. Triggers:
Psoriasis: Can be triggered by stress, infections, skin injuries, cold weather, smoking, and certain medications. It is also linked to immune system issues where skin cells multiply too quickly.
Eczema:Often triggered by allergens, irritants, temperature changes, stress, and sometimes food. It is linked to a hypersensitive immune system and often occurs in individuals with a history of allergies or asthma.

4. Age of Onset:
Psoriasis:Can develop at any age, but commonly starts in adulthood, particularly between 15 and 35 years old.
Eczema: Often begins in childhood, with many cases developing before the age of 5. It can continue into adulthood, though some people may outgrow it.

5. Family History:
Psoriasis:There is often a family history of the condition or other autoimmune diseases.
Eczema:A family history of eczema, asthma, or hay fever is common, as it is often linked to allergic conditions.

6. Associated Conditions:
Psoriasis: Can be associated with psoriatic arthritis, which causes joint pain and swelling.
Eczema: May be associated with other allergic conditions like asthma and hay fever.