Acrodermatitis continua of Hallopeau

Acrodermatitis continua of Hallopeau (ACH), a rare type of pustular psoriasis, is typically chronic and localized to the hands and feet, specifically the tips of the fingers or toes and the nail apparatus. It usually starts on one finger or toe but can expand.

About ACH


ACH can cause bone damage and people who develop ACH will frequently lose all or part of their affected nails.


About half (46.2%) of people with ACH also have plaque psoriasis. Women are slightly more likely to develop ACH than men.[1]

Pustular Psoriasis Resource Center

NPF is here to help with resources, advice and stories specifically for you to help live the healthy and happy life that you want.

Go to the Pustular Resource Center

[1] Twelves S, Mostafa A, Dand N,et al. Clinical and genetic differences between pustular psoriasis subtypes. J Allergy Clin Immunol. Mar 2019; 143(3): 1021-1026. doi:10.1016/j.jaci.2018.06.038.

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