Determination of Singe and symptoms of Paederus dermatitis in Behshahr hospital in 2000

Introduction. The paederus dermatitis is a dermatitis with vesicle and erithma that heals spontaneously. Its causes is a small insect of the rove beetles family with the name of pederasts in staphylinide.this disease is in the scattered of the word and in Iran we see in wet and warm area, specially in Gilan and Mazandaran and Khuzestan. We have problem in diagnosis of this disease because of variety in signs and symptoms, kinds of figure and area. In this study we want to show the signs and symptoms and the other specifications of this type of dermatitis.Material and Methods. This investigation is a cross sectional study. This study accomplished in 2000-2001 from the last month of summer till next two month. Sample study was 94 patients with paedrus dermatitis. The samples were chosen from the patients how they are coming for treatment the paedrus dermatitis to the clinics or hospitals of behshahr city. the patients visited by the dermatologist and the patients information including signs and symptoms, types, sizes, shapes and the location of the rash in different organs with dermographic information collected and analyzed. Results. According to this study the paedrus dermatitis is a multiple signs and symptoms diseases. The most common sign and symptom of this disease was the itching and burning twin pain. The most common clinical sign of this disease in this study was erithma and vesicle in location of rash (51%)that in some patients with postula.the most common location of rash was the neck and face(31%)and so hand(30%). The most common shape of the rash in paedrus dermatitis was linear (35%) and in single area (38%) with 2-6 cm in size.Conclusion. According to the finding of this study the most common sign in paedrus dermatitis in a northern city in Iran was burning and itching twin pain. The most common finding in patients is erithma and vesicle and in some patients with pustule. The rash of paedrus dermatitis was linear 2-6cm in size. This dermatitis in reason of the more contacts in Mehr and Sahrivar were the more prevalence that this clue can help the physicians to the diagnosis.