Types of Psoriasis

Pustular psoriasis is a rare but serious form of psoriasis that produces pus-filled blisters rather than the scaly plaques most people associate with the condition. The pus is sterile — caused by inflammation, not infection. It has three clinically distinct subtypes, ranging from a localized condition on the hands and feet to a life-threatening generalized emergency. This guide covers all three.

Palmoplantar psoriasis affects 12–16% of people with psoriasis and consistently ranks as one of the most functionally disabling forms of the condition. When the palms and soles are covered in thickened, cracked plaques, nearly every daily activity becomes painful. This complete guide covers symptoms, causes, diagnosis, the full treatment pathway, and daily management strategies.

Scalp psoriasis affects up to 56% of people with psoriasis and is one of the most functionally disruptive locations for the condition. The hair creates a unique challenge for treatment — getting active ingredients through to the scalp requires specific techniques. This guide covers everything: symptoms, diagnosis, the full treatment pathway from OTC to biologics, and practical hair care strategies.

Guttate psoriasis is distinctive for the speed and manner in which it appears — dozens of small, teardrop-shaped scaly spots erupting across the torso and limbs, often within days of a strep throat infection. It is the second most common form of psoriasis and the type most likely to affect children and young adults. This guide explains what it is, why it happens, and what the treatment and long-term outlook look like.

Plaque psoriasis affects 80–90% of people with psoriasis, making it by far the most common form of the condition. Raised, thickened plaques covered in silvery-white scale are its hallmark — but how it looks, where it appears, and how severe it becomes varies considerably from person to person. This guide covers everything you need to understand your diagnosis and your treatment options.

Red, itchy skin isn't always an allergy — and treating it like one when it's psoriasis can delay real relief by months. This guide breaks down exactly how psoriasis and skin allergies differ, with a 7-question self-check to help you recognize what you're dealing with.

Palmoplantar psoriasis and psoriatic arthritis frequently coexist — and when they do, the same hands and feet are affected by two distinct processes simultaneously. Understanding the overlap, recognizing the warning signs of joint involvement, and seeking the right specialist team early is what separates managed disease from progressive joint damage.

Palmoplantar psoriasis and palmoplantar pustulosis look similar and affect the same areas — but they are not the same condition. The plaques of PP and the pustule cycles of PPP require different treatment philosophies. This guide breaks down exactly how to tell them apart.

Both conditions cause red, itchy skin — but they are fundamentally different diseases with different treatment paths. Getting the diagnosis right is the first step to getting the treatment right.

Erythrodermic psoriasis affects about 2% of people with psoriasis but is the most dangerous form of the condition. When it strikes, the skin's critical functions — temperature regulation and fluid retention — break down. Knowing the warning signs and responding quickly can be lifesaving.

Psoriatic arthritis develops in up to 30% of people with psoriasis, often years after skin symptoms appear. Without treatment, it can cause permanent, irreversible joint damage. Recognizing the early signs and getting a rheumatology assessment promptly is one of the most important steps a person with psoriasis can take.

If anti-dandruff shampoos have made no difference after weeks of use, scalp psoriasis may be the reason. Around half of all people with psoriasis have scalp involvement — and it is one of the most commonly misdiagnosed locations. This guide breaks down exactly how to tell the two conditions apart and what treatment options are available for scalp psoriasis specifically.