The septum or nasal septum is the cartilaginous wall that divides the two nostrils. The cartilage is, however, usually not pierced. It is the thin strip of very soft and flexible skin, just between the cartilage and the bottom of the nose, where septum piercing is mostly done. Piercing the skin instead of the cartilage can greatly minimize the pain, as well as other discomforts associated with this type of body piercing. This piercing should be done only with a needle. As far as jewelry is concerned, captive bead rings, circular barbells, plugs, tusks, curls, and septum retainers can be used. Some metals used in nose rings are safe, but may cause allergies or sensitivity. Risk of bacterial infection is also present in swimming pools, bodies of water and baths.