A completely blocked nose that does not improve despite medicines is often due to severe nasal swelling or sinus blockage rather than simple congestion. Do frequent steam inhalation, stay well hydrated, keep your head slightly raised, and avoid dust or cold exposure to help open the nose. Limit the overuse of nasal sprays like Otrivin, keep the nose moist, and try gentle saline rinsing if comfortable. If the blockage persists or you develop facial pain or headache, consult a doctor to review your treatment and properly clear the sinus cause.