Any thing irritates your throat may cause throat pain.It can be due to fried or spicy food,it can be due to allergy of some food,pollen body,dust.This may cause throat irritation
,running nose etc.
If you smoke or habit of chewing gutkha, you stop gutkha or smoking.
There are few sinuses
in the head,frontal,maxillary,orbital,occipital. Infection in any of these sinus can cause sinusitis
.Same way infection in the nose is called rhinitis,if it is due to allergy,it is called allergic rhinitis
Avoid fried,chillis or junk food and allergic factors which can produce allergy.
Do not worry about cancer.