Hello, based on your symptoms, this could be due to allergic rhinitis, viral rhinitis, or sinus inflammation with post-nasal drip. Alternating blockage of the nostrils can also occur due to the normal nasal cycle. Advice: Use saline nasal spray 3–4 times daily to help clear the nasal passages and loosen mucus. Avoid dust, smoke, strong perfumes, and other potential allergens. Drink plenty of fluids and consider warm fluids to soothe throat irritation. Avoid prolonged use of Nasivion (oxymetazoline), as using it for more than 3 days can worsen nasal congestion. If symptoms suggest an allergy, an antihistamine or steroid nasal spray may help, but the appropriate medicine depends on your medical history and examination.

avoid using Nasivion for more than 3 days, and book a consultation with me  so we can assess the cause and guide appropriate treatment

kindly do connect and consult with me for better treatment plan and advice on your case via PRACTO app

Need a few more details please consult for further evaluation and treatment

Steam Inhalation will be beneficial.

A blocked nose that switches sides, thick mucus dripping down the throat, and a mild headache without fever usually points to allergic rhinitis or sinus congestion rather than a plain cold. A full week of this pattern is common and very treatable.