What should you know about fatigue and post nasal drip?

Post-nasal drip is mucus moving from the nose or sinuses towards the throat. It can cause throat clearing, cough, a tickling feeling, hoarseness, or an unpleasant taste. Nasal blockage and coughing may disturb sleep, leaving you tired the next day. A cold or COVID-19 can cause both tiredness and increased mucus. Allergy may bring sneezing, itchy eyes, and clear drainage without fever. Thick mucus, facial pressure, or reduced smell can occur with sinus inflammation. Fatigue can also have a separate cause, such as anaemia, dehydration, coeliac disease, kidney disease, burnout, or chronic fatigue syndrome.

Rest, drink fluids regularly, and avoid smoke or other irritants. Saline nasal rinsing may loosen mucus; use safe water and clean equipment according to the product instructions. Raising your head slightly while sleeping can reduce throat drainage. Notice whether symptoms follow dust, pets, seasonal exposure, a new medicine, or a recent infection. A pharmacist can advise on suitable allergy or nasal treatments, especially if you are pregnant or have other medical conditions. Arrange a clinical review if fatigue affects work or daily tasks, or if nasal symptoms continue after the trigger has settled.

Seek urgent help for severe breathing difficulty, blue lips, confusion, fainting, chest pain, or swelling of the face or throat. Arrange prompt medical care for a high fever, severe facial pain, worsening symptoms after initial improvement, blood in mucus, or difficulty swallowing. A clinician may examine your nose, throat, chest, and general health, then decide whether testing or targeted treatment is needed.

Could allergy, sinus inflammation, infection, or a separate cause explain my fatigue? Should I be checked for anaemia or another underlying problem? Which nasal treatment is suitable for me, and how should I use it? What changes would mean I need a prompt review?