I have chronic sinusitis, and while medication relieves symptoms, it often recurs. What causes this, and do I need surgery? (Kim Lan, 37, Ho Chi Minh City)
A 35-year-old patient from Dong Nai, Kim Ngo, often experiences nasal congestion. She found that inhaling medicated oil initially helped, but its effectiveness waned over time. She wonders why this occurs and if she should consult a doctor.
