This spider is about the size of a cherry pit; it has orange spots on its back, and a large yellow spot on its belly. Its venom is particularly virulent, causing nervousness, weakness, trembling, coldness, anxiety, fainting, and a cold sweat. The homeopathic remedy was proved and introduced by Dr. Hering in 1832. Theridion acts mainly on the nerves, spine, and bones. It is given for conditions such as spinal inflammation, toothache, vertigo, motion sickness, bone decay, and Meniere's disease (a disorder of the inner ear). All these conditions are characterized by extreme sensitivity to noise and vibration that penetrate the body and cause pain. The spine is especially sensitive.