We've already discussed how moisture is your sinuses' friend, and how humidifiers and vaporizers can help take the edge off dry air. But now and then you need an approach that is a bit more direct. At such times, a hot, steamy shower or a steam bath schvitz might be just what the otolaryngologist ordered. If you prefer sucking steam fully clothed, then simply put a towel over your head, lean over a pot of warm water and breathe in the healing.
But don't let that word "steam" fool you. The last thing you want to do is to suck scalding vapors into your sensitive sinuses. To avoid blistering your brains, boil the water in advance and take it off the heat before starting your treatment.
Lean over in a comfortable position, use the towel to trap the vapor, and breathe slowly and easily for about 10 minutes. Do this two to four times a day [source: A.D.A.M.]. Plain old water is all you really need, although some steam-suckers like to add aromatic or menthol-containing substances as well. Just bear in mind that additives can backfire if they irritate your nose further, so do a little experimenting first.
Sinus Congestion Tips
Here is some information to help you with sinus congestion.