She can use a lota (it is a traditional tool for yoga) that she fills withsalted water (previously boiled) and rinse the nose and cleanse the sinuses. search for "lota sinuses and nose cleaning" on google .. it is painful while using it (when sinuses are infected) but it works. Anything else is just short time relief with no long time recovery effects. Her sinuses are infected and this is the only solution. Add one drop of eucalyptus oil to the water and shake well before using. It will help disinfect the sinuses and reduce sinuses pain while using the lota. also it will prevent inflamation of the optic nerve that passes just next to the sinuses.. this has to be done every day (two lota full of water ) for several months, several times a year for 2 years to treat the problem once for all. I see many thais using their menthol sticks, which, although widely used, are useless for treating their sinuses problem for real.