3. Inverse Psoriasis: Smooth, red patches of skin that worsen with friction and sweating, commonly found in skin folds like the armpits, groin, and under the breasts.

4. Pustular Psoriasis: Characterized by white pustules (blisters of non-infectious pus) surrounded by red skin, often on the hands or feet.

5. Erythrodermic Psoriasis: Rare but severe, causing widespread redness, severe itching, and shedding of scales over large areas of the body.

Diagnosis and Treatment:
1. Diagnosis: Psoriasis is typically diagnosed by a dermatologist based on a physical examination of the skin, nails, and scalp. Sometimes the diagnosis needs to be confirmed by a skin biopsy.

2. Treatment Options:

a-Topical Treatments: Corticosteroids, vitamin D analogs, retinoids, and moisturizers are commonly used to reduce inflammation, slow down skin cell turnover, and alleviate symptoms.

b-Phototherapy (Light Therapy): Exposing the skin to ultraviolet (UV) light under medical supervision can help reduce inflammation and slow down the rapid skin cell growth associated with psoriasis.

c-Systemic Medications: For moderate to severe psoriasis that doesn’t respond to other treatments, oral or injectable medications such as methotrexate, cyclosporine, biologics (e.g., TNF-alpha inhibitors), or newer small molecule drugs (e.g., apremilast) may be prescribed to suppress the immune system and reduce inflammation.

d-Lifestyle and Home Remedies: Moisturizing regularly, avoiding triggers (like stress or certain medications), and maintaining a healthy diet and weight can help manage psoriasis symptoms.

e-Management of Psoriatic Arthritis: For individuals with psoriatic arthritis, treatment may include nonsteroidal anti-inflammatory drugs (NSAIDs), disease-modifying antirheumatic drugs (DMARDs), biologics, and physical therapy to manage pain, reduce inflammation, and preserve joint function.