This spider uses venom, passed through small holes in its jaw, to numb its victim. The homeopathic remedy was first proved by the German homeopath von Grauvogl in the mid-19th century. He promoted Aranea diad. as a key remedy for people with an abnormal sensitivity to cold and damp. Aranea diad. is used mainly for disorders of the nervous system characterized by neuralgia with sudden, violent pain that causes wincing and occurs at regular intervals. Facial neuralgia is an example. Severe burning nerve pain affects the cheek, lips, gums, or chin on one side of the face. Other symptoms of neuralgia include numbness and a sensation of heaviness.