What If Allergy Medication Does Not Relieve a Blocked Nose?

Antihistamines can ease allergy symptoms such as sneezing, itching, and a runny nose, but they may not be enough when the main problem is swelling inside the nasal passages. A nasal spray may also need regular use before its full effect is noticed, while a tablet may not reach congestion as effectively. The product, dose, technique, and timing all matter, so follow the label or the instructions given by a clinician.

Congestion can also come from a viral infection, dry air, smoke or fragrance exposure, a deviated nasal septum, nasal polyps, or overuse of a decongestant spray. A blocked nose that is mainly on one side, keeps returning, or continues after other allergy symptoms settle deserves an assessment rather than repeated self-treatment.

Review the medicine with a pharmacist or doctor, especially if you are combining products. Ask whether a corticosteroid nasal spray, a different antihistamine, or another approach fits your symptoms. Do not start, stop, or combine medicines without checking the instructions; some decongestant sprays can make congestion worse when used for too long.

A saline nasal rinse or spray may loosen mucus and wash away irritants. Use sterile, distilled, or previously boiled and cooled water for a rinse, and clean the device as directed. Avoid smoke, strong scents, and known triggers, and keep indoor air comfortably humid without allowing mould to build up. For technique, aim a nasal spray slightly outward, away from the centre wall of the nose, while breathing in gently.

Seek urgent care for difficulty breathing, swelling of the lips or tongue, faintness, or rapidly worsening symptoms after taking a medicine. These can signal a serious allergic reaction.

Arrange a prompt appointment for severe facial pain or swelling, a high fever, eye swelling or vision changes, repeated nosebleeds, or thick discharge with worsening illness. Book a routine review if the blocked nose does not improve, repeatedly disrupts sleep, affects your sense of smell, or remains mostly on one side. A clinician can examine the nasal passages and distinguish allergy from infection, structural narrowing, or another condition.

Take a list of every tablet, spray, and supplement you use, along with when the blockage began and whether it affects one or both sides. Useful questions include: Could another condition be causing the congestion? Is my spray technique correct? How long should I use this treatment? Could any of my medicines be worsening the blockage?