What is the best OTC medicine to take for flying with a sinus infection?
You may like to consider a nasal irrigation to clear any blocked nasal passages from the mucus that your infected sinus may be producing. Flying long hours may also lead to very dry nasal passages which your sinus may response by excessive production of inflammatory cytokines and histamines which leads to more mucus production. hence a nasal irrigation may help to lubricate the nasal cavity. ( e.g sterimar) if you sinus infection is causing u severe inflammation at your sinus nodes, characterized by pressure at ur cheeks or forehead and/or thick mucus production, you may like to consider a steroidal nasal spray. ( e.g flixonase, nasonex, Rhinocort, avamys) to treat the inflammation.
Why have doctors still not been able to find a 100% efficient cure or medicine that works in every case for sinusitis?
Because the cause of sinusitis isn't 100% understood. I do not mean that the histamines coming off of individual mucosal cells are unidentified, just that the cause of the inflammation has a fairly broad spectrum. No one organism causes sinusitis in two different people. No one allergen can be blamed. No one process can be pinned down, across the board, with a patented drug for treatment.
What I have been taught and as I have observed: dysbiosis is the number one cause of sinusitis -- especially after periodic and chronic use of antibiotics. The bacteria to be killed off with this treatment are very specific and bacteria that are considered generally benign, too, are destroyed (for the most part) leaving vacant mucosal tissues to generate snot and other microorganisms move in: i.e. mold, yeasts, viruses. Eventually, bacteria are reintroduced (even the more notorious species) and the overpopulation begins again. Nobody can avoid having microflora in their sinuses. Managing that microflora is the immune system's job, but the standard approach of steroids suppresses that function. If underlying allergies to environmental irritants are presenting, the inflammation worsens and the allergies become a chronic stressor in the upper respiratory system.
Irrigation will help flush the mucosa but there are other things that can be added to the menstruum (this does need to be sterile, not reintroducing more tenacious bacterium) to effectively decrease inflammation, improve drainage and repair tissue damage. Some people are uncomfortable with Netti pots, so a formulated cup of tea plus a hot towel around the face can substitute this action, although not directly. I also recommend a good steam bath for chronic sinus congestion to improve the lymphatic system's dilation and purging actions, repeatedly. A dry sauna doesn't have the same effect.
The sinuses are really, a filter or an estuary for the body via the lymphatic system in trying to keep pathogens out of the proximal tissues in the respiratory tract. I would bet my bottom dollar that you're experiencing more innocuous symptoms, mild irritations or digestive issues that do not seem connected but very much are. An integrated practitioner or even an allergist would be able to identify these immunological processes, but a witch-doctor (see also: herbalist, acupuncturist, etc.) could offer both symptomatic and resolvent relief via formulas and soft-touch techniques. Observation is required, though, to see if overproduction or underproduction by the mucosa is the real culprit and the approach must be tailored.
You might want to review your diet as well. I could prattle on for hours about the visceral connection between the small intestine and the lymphatic system, but I'll keep this short: diary/milk/sugar is congestive within the intestines. The lymph works to flush out coagulated byproducts and globules of the stuff. A bogged down immune system presents in the sinuses, first and progresses into the lungs.
What are the alternate medicine for sinusitis during pregnancy?
Most acute sinusitis cases not prescribed antibiotics resolve spontaneously.
Pouring boiling hot water on dried camomile flowers and inhaling the water vapor/steam containing the ethereal oils of the camomile (which according to German pharmacological research from the thirties has anti-inflammatory properties) usually with a towel around your face to prevent most vapor loss would be a good alternative, inhaling water vapor will also help you get rid of the mucus in the upper airways so help unblocking the nasal passages and drain the sinuses.