A 34-year-old male patient, previously healthy, was evaluated because of painful lesions on his fingers with 4 years of evolution. Physical examination revealed erythema, pustules, hyperkeratosis with yellowish scales on the tips of his fingers accompanied of onychodystrophy of the nail apparatus in all the areas involved. On the fourth finger of the left hand there was koebnerization, probably induced by the ring, with pustular and keratotic lesions sharply demarcated (Fig. 1). The hepatitis B and C serology, anti-HIV test, QuantiFERON tuberculosis test were negative and chest X-ray was normal. After 3 months of treatment with acitretin (1 mg/kg/day), a complete resolution of the acrodermatitis was observed (Fig. 2).

Figure 1

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Figure 2

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Acrodermatitis continua of Hallopeau, is a rare, chronic, recurrent disease with unknown etiology, that is considered a localized form of pustular psoriasis. The condition presents with erythema and tender pustules that rupture and coalesce in a lake of pus on the tip of a digit, more frequently arising on a finger than a toe.