The paper discusses a case of erythema nodosum in an almost 2-year-old boy diagnosed for fever and skin lesions on the extensor parts of the lower legs. Extended medical history and diagnosis allowed to identify Salmonella Enteritidis as the culprit of symptoms. This entity is rarely found in the paediatric population, especially in children <2 years of age. It clinically manifests with small, painful, red to purple subcutaneous nodules, mostly developing in the lower extremities. Only few cases of correlation between erythema nodosum and this serotype of Salmonella have been described in the available literature. Reminding general practitioners and paediatricians of the basic information about the possible course of the disease will allow for earlier differential diagnosis and more rapid and appropriate treatment.