Moxibustion is a kind of heat therapy. It involves burning a herb called moxa, or artemisia vulgaris, or - more ugly sounding - mugwort.
There are several ways to do this, what I employ most often is indirect moxibustion, where moxa is shaped into a cylindrical form a bit like a cigar, lit and moved about 1 inch over the body. This can also be combined with needling when a particular effect is desired. I will work closely with you to make sure that the sensation of heat is distinct but pleasant, and most people find it rather enjoyable.
Moxibustion can help infuse warmth "deep" into a joint such as a knee and help with pain. It may also be used at particular acupoints for a distinct effect.