[Perianal dermatitis].

The most often seen perianal dermatitis is the eczema, which is caused symptomatically by haemorrhoids, fissures, fistulas, proctitis, contact allergies, the funnel shaped anus and intensified folding of the perianal skin. Before treatment of the eczema all these causes have to be eliminated. Differential diagnosis of the perianal dermatitis are psoriasis, seborrheic dermatitis, endogenous eczema, intertrigo, proctitis and skin cancer.