Ultrasound-detected dactylitis lesions may help identify patients with psoriasis who are at risk for psoriatic arthritis and ...

While dactylitis refers to nonspecific inflammation of a finger or toe, blistering distal dactylitis specifically refers to a periungual infection, most often caused by group A hemolytic streptococci.

It is nonpruritic and minimally painful. This distal digital dactylitis is characterized by the lack of a cuticle along with erythematous swelling of the proximal and lateral nail folds.