Thanks for your query on Lybrate
"As" per your clinical history is concerned please do a blood differential count to know the cause behind frequent cold and for sinusitis
do take a course Sinarest
tab twice a day for 3 days and Otrivin
nasal spray twice a day for nasal congestion
and add antibiotics Doxy-100 mg once a day for 7 days.
Do follow lifestyle modifications like this for future-
1) Avoid upper respiratory infections. Minimize contact with people who have colds
. Wash your hands frequently with soap and water, especially before your meals.
2) Carefully manage your Allergies. Work with your doctor to keep symptoms under control. Do check your blood differential count every month.
3) Avoid cigarette smoke and polluted air. Tobacco smoke and other pollutants can irritate and inflame your lungs and nasal passages.
4) Use a humidifier. If the air in your home is dry, such as it is if you have forced-air heat, adding moisture to the air may help prevent Sinusitis. Be sure the humidifier stays clean and free of the mold with regular, thorough cleaning.
Hope that helps.