Congestion at night is worse than congestion during the day for a physiological reason: nasal tissue congests further when you lie flat, because blood pools in it rather than draining. So the nose you could just about breathe through at 10pm becomes unusable at 11.

Here is what works, in the order to try it.

1. Elevate your head — properly

Not an extra pillow bent at the neck, which mostly just kinks your airway. Raise the whole upper body: blocks or risers under the head end of the bed, or a wedge pillow.

Four to six inches is enough to make a real difference, and it is the single most effective structural change for nighttime congestion.

2. Saline rinse before bed

The most underused intervention on this list. A neti pot or squeeze bottle physically flushes mucus, allergen and irritants out of the passages. Use distilled, previously boiled or sterile water — never straight from the tap.

Drug-free, cheap, and it works within minutes. If you do one thing on this list, do this one.

3. Steam

A hot shower before bed, or a bowl of hot water with a towel over your head for five minutes. Thins mucus and soothes the lining. The effect is short-lived, so time it for immediately before you get into bed.

4. Humidify the room

Dry air thickens mucus and inflames the nasal lining, and winter heating routinely drops indoor humidity below 30%. A humidifier addresses the cause rather than the symptom, and it improves dry mouth and throat at the same time.

5. Roll onto your other side

Worth knowing at 3am. When you lie on your side, the lower nostril congests more and the upper one clears. Switching sides usually opens things up within a minute.

This layers on top of the nasal cycle, in which your nostrils naturally alternate every one to six hours anyway. (Why one nostril blocks and then the other.)

6. Open the nasal valve mechanically

If your restriction is at the nasal valve — the soft section about a centimetre inside the nostril that draws inward on inhalation — a strip lifts it outward and the difference is immediate.

The test takes ten seconds: press the sides of your nose gently outward with two fingers and inhale. If that is noticeably easier, the valve is your restriction and a strip will help. If nothing changes, your blockage is further back and a strip will not reach it. TitanAir strips use spring-loaded bands to produce that lift — the lift is the mechanism, so a flat adhesive strip is a different product. (Exactly where it goes.)

7. Treat the cause, if it is allergic

If your congestion is allergy-driven, a steroid nasal spray is the mechanism-matched treatment — it reduces the inflammation itself. It takes several days to reach full effect, so start before your season rather than during it.

Add bedroom exposure control: hot-washed bedding weekly, allergen-proof mattress and pillow covers, windows shut in pollen season, a shower before bed, pets out of the room. (The full picture on allergies and nasal breathing.)

8. See a doctor if it is persistent

Congestion that lasts months, is always on the same side, or comes with facial pain and discoloured discharge is not something to manage with a humidifier. Deviated septum, polyps, chronic rhinitis and sinusitis all have proper treatments.

The two things that make it worse

Decongestant sprays beyond three days. Oxymetazoline and xylometazoline work brilliantly and then cause rebound congestion — the tissue adapts and swells worse when you stop. People end up using them for months to treat the congestion the spray itself is causing. Three days maximum, and check with a pharmacist before starting.

Alcohol. It is a vasodilator, so it swells nasal tissue directly, and it relaxes the upper airway on top of that. A nightcap for a blocked nose is working against you twice. (What one drink costs you overnight.)

And do not tape a congested nose

Unambiguous: mouth taping assumes your nose is a fully adequate airway. When it is not, taping removes the route doing the work.

Get the congestion sorted first. When you can sit up, calm, and breathe comfortably through your nose for a full minute, Titan's mouth tape is a reasonable thing to add — and not before. (The full rule.)

The bottom line

Elevate your head properly, rinse with saline before bed, steam immediately before lying down, humidify the room, and roll to your other side when one nostril blocks.

Open the valve with a strip if that is where your restriction is, and treat allergic inflammation at the source. Avoid decongestant sprays beyond three days and evening alcohol — both make tomorrow night worse.