What Causes Runny Nose?

Allergic runny nose/rhinitis is probably, the most frequently occurring heath complication. Even though, allergic runny nose is not life threatening health complication, but certainly it is life crippling complication. Severe nasal allergic people lead a very pathetic life as they have to suffer round the clock and round the year.
Anyhow, I am happy to announce to the world about two important breakthrough treatments which are the result of my research work spanning over a decade. I was forced to take up this research work, to escape myself from the constant miseries caused by nasal allergy.
To understand the reason behind the excessive runny nose, we should know little about the spot in our nose, where the runny nose problem starts. Anterior Portion of the Nasal Cavity (APNC) is the area in the nasal cavity, where the runny nose problem occurs. Hence, APNC is the right area to treat and resolve the problem. All visitors are recommended to read the details in the following paragraphs about APNC, to know why I selected APNC to tackle the problem of excessive runny nose.
About the anterior portion of the nasal cavity (APNC):
Anterior portion of the nasal cavity (APNC), starts from the external opening of the nasal cavities and ends at about 5 cms in the nasal cavities (as shown in the adjacent Fig.). This APNC area is covered with mucus membranes. The inferior turbinate projects from the lateral wall of the nasal cavity in this APNC area. The tissue covering the APNC area is thicker and has got rich supply of blood through the dense net work of blood vessels and has got highly sensitive nerves. Goblet cells, which are capable of secreting thick mucus are also present in APNC area. Extraordinary increase of goblet cells takes place due to viral infection and allergic reaction. The erectile tissue present in APNC area swells  by the stimulation provided by irritants. Sensitivity of this erectile tissue increases due to inflammation.
Mucus Secretions in APNC Area
Daily, about 1 litre of mucus secretion takes place in APNC area. Nasal mucus consists of:-
  • Plasma leaking from the capillaries
  • Secretions from goblet cells
  • Secretions from serous glands
Factors which aggravate runny nose & congestion
Excessive nasal secretions are generated due to nasal allergy, common cold and pollution in APNC area.
1.APNC area is capable of leaking huge amounts of plasma. Inflammation of APNC area caused by nasal allergy, common cold and pollution aggravates the plasma leakage.
2.Goblet cells, which secrete thick mucus increase extraordinarily (the process is known as hyperplasia of goblet cells) in APNC area during allergic reaction, common cold and  exposure to pollution. Once the granules of mucus secreted by the goblet cells enter the nasal cavity, the volume of this thick mucus increases extraordinarily (around 500 times) due to hydration. The visco-elastic character of this expanded mucus will further increase the nasal congestion and breathing problems.
3.APNC area contains erectile tissue. The erectile tissue becomes over sensitive due to inflammation and quickly responds to stimulants/ pollutants and swells instantly to cause narrowing of the nasal cavity and breathing problems.
So, both excessive nasal secretions and tissue erection either individually or together will lead to breathing problems.
Other Factors:
Milder Irritants & the hyper nasal secretions: Inflammation enhances the sensitivity of the APNC area. Usually, the innumerable milder irritants present in the air we breathe in, should not cause excessive nasal secretions. Enhanced sensitivity of APNC due to inflammation (also known as PRIMING), causes nasal secretions even to the stimulation by the milder irritants. As the milder irritants are innumerable in air and hence cause hyper nasal secretions when inflammation exists in APNC area.
Remote stimulation of nasal secretions: Remote stimulative signals generated at various areas in mouth, throat, eyes, facial skin and probably some parts of esophagus (through a very complex net work of nerves), can cause APNC area to produce hyper nasal secretions. So, it is very important to keep these areas free of infection & inflammation. Those people with over sensitive nerves in mouth, throat and esophagus passage suffer from excessive nasal secretions while eating spicy and hot food, this is commonly known as gustatory rhinitis. I have noticed, excessive nasal secretions are stimulated while eating ice cream also!
Some more reasons for runny nose: Mucus membranes are sensitive to heat, pressure, touch, humidity and hence these factors can cause excessive runny nose among those people having over sensitive nerves in APNC area.
Runny nose caused due to barometric pressure, humidity, perfumes comes under the classification: idiopathic/vasomotor rhinitis.
Excessive runny nose after nasal surgery:  Excessive runny nose is also caused for some days after nasal surgeries like: polypectomy, ethmoidectomy, turbinectomy, sinus surgery, septoplasty as nerves are exposed to air directly, at the sites where the tissue is removed. CWT may help to reduce excessive runny caused during post surgery period. However, timing and frequency of CWT has to be decided by ENT specialist in the case of post surgery period. 

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