Often no specific cause for the eruptions is found. However, it is sometimes linked to underlying diseases and conditions such as: * Food (including blue cheese or tomatoes). * Contact Dermatitis (i.e. cleaning agents, fabric softeners, etc.) * Fungal, Bacterial and Viral infections such as sinusitis, tuberculosis, candidiasis or tinea. * Drugs including finasteride, etizolam (and benzodiazepines), chloroquine, hydroxychloroquine, oestrogen, penicillin and amitriptyline. * Cancer (especially the type known as<unk>  gyratum perstans, in which there are concentric and whirling rings). * Primary biliary cirrhosis. * Graves disease. * Appendicitis. * Lupus * Pregnancy <unk>  usually disappears/stops soon after delivery of baby). * Hormone (Contraceptive Pill, Stress, Hormone Drugs) * Lyme disease
Erythema annulare centrifugum
Tuberculosis cutis orificialis
Tuberculosis verrucosa cutis
Papillomatosis cutis carcinoides
Ichthyosis bullosa of Siemens
Generalized granuloma annulare
Granuloma annulare
Folliculitis nares perforans