UP and up and up we go, right? WRONG! The Sixth House in terms of the body actually moves back DOWN relative to the Fifth House. This House is typically ruled by Virgo and governs the intestines in the body. Why? Well, Virgo is really gifted most often in picking things apart to synthesize something else. This, it turns out, best fits digestion as a process since food is picked apart in order to be digested.
You may recall that when we discussed the Second House we talked much about "the Body". Bread, in the ancient world, was nearly synonymous with body since that was the food that sustained it most often. Bread was composed then mostly of wheat. Virgo, unsurprisingly, has a strong association with wheat.
Virgo also has much to do with the nervous system since the nervous system is maintained by how well our digestion is or is not working. Virgo is the stuff that "connects" the rest of our body together, so as opposed to being some inert lump of matter all of it works and talks with each other. It follows then that if you have nervous condition issues, diet is most often a discussed element.
Analysis, routines to keep the body in working order, necessary work--these are all "watch words" for Virgo. Humility is also indicated here, as to do this job well the goal is usually to not be noticed. Think of it this way, you do not notice when your hand does as your mind tells it. You only notice it when it does not.