If it is from last three months , then it could be allergic rhinitis or vasomotor .
Steam inhalation.
Increase citrus fruits in diet.
Breathing excersise .
Few medicine and nasal puff.
Build up immunity .
Next Steps
I understood your concern and noted the problem as well .I need to ask few more details to make a diagnosis and start treatment and advice which suits you. Pl consult me on Practo , so that I can help you better.book a time slot as per your convenience for consultation.y