It is only the body of the Rakshas without the head. Since it is without any senses, he is a focus less planet. In its dasha, the person usually is quite confused though it may make one very spiritual. Ketu. is a moksha giving planet but of an unstable mind. It invariably gives cuts and wounds in its dasha along with sudden gains.
Diseases- It gives eye and stomach trouble along with accidents or ailments which require sudden surgery. It also gives pox and stupidity.