Congestion in the sinuses can often be alleviated by balancing the cranial rhythms. This gentle balancing is something I include with every treatment in my office.
The rhythms of the bones in the head are very subtle, and are related to the circulation of the cerebrospinal fluid. Correcting aberrances in these rhythms can relieve headaches, sinus congestion, or vertigo.
I also have an effective direct adjustment for the sinuses with my Activator instrument. The adjustment is gentle, and is often followed by immediate sinus drainage.