What are the different types of psoriasis?

There are different types of psoriasis – including those which affect particular body parts. Some young people we talked to had been told by their doctor which type of psoriasis they have. Others, like Lola, hadn’t been told. A few people had several types of psoriasis at once. Some people, like Adam and Hannah, found their psoriasis changed from one type to another over time.

The types of psoriasis include:

  • plaque psoriasis
  • guttate psoriasis
  • pustular psoriasis
  • scalp psoriasis
  • nail psoriasis
  • genital psoriasis

Dr McPherson talks about some of the types of psoriasis.

People often talked about the severity of their psoriasis. This is usually based on how much of their body is affected (0-100% of coverage) – some people knew this as their ‘PASI’ (Psoriasis Area Severity Index) score. Hannah says hers was 70%-80% last year but is now down to 3% since having biological injections. Lots of people had fears about their psoriasis becoming worse in the future. Yet, it could also be frustrating to be told by doctors that certain treatments weren’t available to them currently because their psoriasis wasn’t considered ‘bad enough’.

Megan describes how the severity of her psoriasis changed over the years.

Age at interview 16

Gender Female

Age at diagnosis 7

View profile

Adam worries about what the future might hold with the severity of his psoriasis and whether treatments, like steroid creams, will still be effective on his skin.

Age at interview 24

Gender Male

View profile

Psoriasis subtype: plaque psoriasis

Plaque psoriasis is the most common type of psoriasis and many of the people we talked to had it. The symptoms include red, dry and flaky skin in patches of different sizes of more than 1cm. Some people had fairly small plaques of psoriasis, others had big areas covered by psoriasis plaques. This type of psoriasis tends to be chronic (long lasting), for which certain triggers can cause more severe flare-ups. The size and location on the body of the psoriasis can affect which types of treatment are used.

When Damini has a flare-up, her psoriasis plaques develop quickly.

Age at interview 21

Gender Female

Age at diagnosis 4

View profile

Abbie talks about the body parts affected, such as her legs where she gets big psoriasis plaques.

Age at interview 20

Gender Female

Age at diagnosis 10

View profile

Psoriasis subtype: guttate psoriasis

Guttate psoriasis describes a particular pattern of teardrop shaped psoriasis patches less than 1cm in size. Some said it looked like a rash on their skin. People who have had guttate psoriasis are more likely to develop plaque psoriasis. Guttate psoriasis can be a reaction to a trigger, such as a throat infection, and some people found they had more episodes of guttate psoriasis if they got further sore throats. For Hannah and Jack, putting on steroid creams to guttate psoriasis could be time-consuming and frustrating because it means applying it to each little patch.

Hannah talks about her history of skin conditions, including changing from plaque to guttate psoriasis.

Age at interview 24

Gender Female

Age at diagnosis 16

View profile

Adam uses a steroid-based ointment on his guttate psoriasis. Because the patches are so small, he tends to apply it to the general area affected.

Age at interview 24

Gender Male

View profile

Lisa has guttate psoriasis. Although the patches are small, she has them all over her body and finds they show through some of her clothes.

Age at interview 20

Gender Female

Age at diagnosis 11

View profile

Adam had plaque psoriasis (including on the scalp) which cleared up after phototherapy but then came back as small guttate psoriasis patches. In his experience, ‘plaque psoriasis can be a lot more irritating and a lot more painful at points and flaky’ whereas guttate psoriasis looks ‘like chicken pox or something like that’. Adam read that guttate psoriasis can completely ‘go away’ in children – he was optimistic at first it might for him, but says he now doesn’t think it will.

Psoriasis subtype: pustular psoriasis

Pustular psoriasis is a type in which pus-filled blisters form on the skin. None of the people we talk to specifically named ‘pustular psoriasis’ as the type they had, but Zara and Russell both spoke about developing blisters which are associated with it. Russell hasn’t had blisters with his psoriasis since his first flare-up, but Zara gets them on her feet sometimes.

Zara enjoys playing sports but sometimes blisters and oozing from the psoriasis on her feet stop her from playing them.

Age at interview 16

Gender Female

Age at diagnosis 2

View profile

Psoriasis subtype: scalp psoriasis

The symptoms of scalp psoriasis could be especially embarrassing for people because skin flaking was visible in the hair and on clothes. This was often mistaken for severe dandruff. For some people, the scalp was the first and only place affected by their psoriasis – but most had developed psoriasis on other parts of the body too. Tar-based shampoos and special steroid ointments specifically for the scalp helped some people, but could have downsides such as being difficult to apply.

Having psoriasis on her scalp is difficult for Lola because of the skin flaking.

Age at interview 17

Gender Female

Age at diagnosis 14

View profile

Megan found that the building up of layers of skin on her scalp caused some hair to fall out.

Age at interview 16

Gender Female

Age at diagnosis 7

View profile

Psoriasis subtype: nail psoriasis

Psoriasis can affect the nails, causing them to develop little dents and/or discolour. Sometimes people thought this was a fungal infection at first.

Hannah talks about her experiences with nail psoriasis on her hands.

Age at interview 24

Gender Female

Age at diagnosis 16

View profile

Simon’s nails are affected by psoriasis. He thinks applying the steroid ointments to his scalp helps his fingernails a bit.

Age at interview 22

Gender Male

Age at diagnosis 17

View profile

In some severe cases, nails can become so weak and broken that they come out of the nail bed. The feet were the only place where Zara had psoriasis. She doesn’t remember much about it, but she lost her toenails when she was little and they haven’t grown back.

Psoriasis subtype: genital psoriasis

Genital psoriasis is when areas such as the vulva, penis or bottom are affected. Abbie had some psoriasis on her bottom, which she said ‘obviously that wasn’t the nicest’. She said it can be physically very uncomfortable and a major source of embarrassment. Lucy encourages anyone with psoriasis in ‘intimate areas’ to speak to their doctor for suitable treatment.