As the name suggests, it is very common in nature. Yet, there is no specific remedy available to make it less common. It generally affects the children more compared to the elders, because the immunity of the former is not matured. Cold may not be a serious disease, but still it disturbs and irritates a lot.
According to modern science, cold is usually a viral infection of the linings of the upper respiratory tract. Viruses enter and eventually destroy vulnerable cells in the mucous membrane of the nose and throat.
When virus attack, powerful defensive response of our body produces antiviral chemicals. If the infection still persists, membrane cells produce inflammation that cause dilatation of blood capillaries. As more blood flows through this expanded vessel, affected area becomes warm and red. Swelling narrows the nasal passage and produces congestion of the nose. The mucus secreting cells on the swollen tissue step up their production. Now through this narrowed passage of nose not all the mucus can be transported back to the stomach through oesophagus, so some of it simply drips out. We say that nose is ‘Running’. This onset is usually sudden with a burning and tickling sensation in the nose accompanied by ‘Sneezing’.
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