In terms of relieving any congestion you may have, a decongestant is the best option. These types of drugs help clear up sinus and head congestion. Phenylephrine is available over the counter at drug stores. Some people feel that another decongestant, pseudoephedrine, works better than phenylephrine. Pseudoephedrine is available behind the counter at drug stores.
If you do not notice an improvement in your sinus congestion after 7 days, or if you have a fever, please notify your doctor since these are usually signs of an infection. If that is the case, you will not be able to resolve the problem with over the counter decongestants alone. Your physician may need to prescribe antibiotics.
In treating adrenal fatigue with vitamin B5 I found that incidentally I cleared up my sinuses and got rid of my sinus headaches. Vitamin B5 is a natural anti-inflammatory and mucolytic (mucus thinner). There are absolutely no side effects. Try 500mg. daily. If that is not completely effective, go to 1000mg. That is how much I take. I no longer have any sinus problems.
Often sinus troubles can be cleared up also, by using a neti pot & saline solution a couple times a day. you can google it and find lots of info. our daughter had terrible sinus troubles, and her ear nose throat doctor recommended this to us. My husband and I have problems too so we began to do the same treatments and it works miracles! Once your sinus infection (if thats what it is) is cleared up, do this and you'll possibly never have trouble again. We don't get colds or flu hardly ever, and I'm sure its because of this natural remedy. Worth a try!