Neurogenic inflammation produced by neuropeptides released from sensory nerve endings to the airways is a proposed common mechanism of association between both allergic and non-allergic rhinitis with asthma. This may explain higher association of rhinitis with asthma developing later in life.  Environmental irritants acts as modulators of airway inflammation in these contiguous airways. Development of occupational asthma is often preceded by occupational rhinitis. Among the causative agents are flours, enzymes used in processing food, latex, isocyanates, welding fumes, epoxy resins, and formaldehyde. Accordingly, prognosis of occupational asthma is contingent on early diagnosis and the adoption of protective measures for rhinitis. 
You mention taking curcumin along with Quercetin, do you have any further details about that on your blog here you can point me to? Does one help absorb the other? I am suffering badly with allergies at the moment with cough from nasal drip and bad congestion/rhinitis from dust mite allergy which seems to be made worse by pollen, have begun taking Quercetin Complex from Solgar to see if it will help with histamine reduction as I can not take an anti histamine without feeling like someone drugged me unbeknownst to me (why do all doctors tell you this does not happen with second and third generation anti histamines, it very much does, to me anyway, and a lot of others I see posting their experiences on line) I am so miserable with this, will curcumin further the help to reduce this? Many thanks for any assistance you can provide.
The flu is a viral infection that primarily affects your respiratory system, but it usually runs its course in about a week and does not require serious interventions. Symptoms of the flu include: a fever of 100°F (°C) or higher, chills, cough, sore throat, stuffy or runny nose, headaches, body aches, fatigue, nausea, vomiting, and/or diarrhea.  Although there is no way to cure the flu, you can treat its symptoms using home remedies, take over-the counter or prescription medicines, and take steps to avoid getting the flu in the future.