What Causes Constant Clogging In Right Nostril?

Hi my daughter is 13 yrs old, she alway complains about her right nostril is clogged most of the time. She is learning classical vocal and that's with she faces lots of problems because she has difficulty in practicing lower and high notes.
I would appreciate if you Kidly suggest some good Ayurvedic medicine for her.
Thanks and regards
Deepak
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