Chills and post-nasal drip: what to know

Post-nasal drip is mucus moving from the nose or sinuses toward the throat. It can cause throat clearing, cough, a tickling feeling, hoarseness, or an unpleasant taste. Allergies and viral respiratory infections are common contributors. Chills may occur when the body reacts to infection, but they can also follow cold exposure or exhaustion. Influenza, pneumonia, and sinusitis can include respiratory symptoms with chills; the combination does not establish a diagnosis.

Mucus that is clear and linked to sneezing or itchy eyes may fit an allergic pattern. Facial pressure, worsening congestion, or symptoms that continue should be reviewed. Breathlessness, chest pain, or marked weakness is more concerning than drainage alone.

Drink fluids, rest, and use saline nasal spray or a saline rinse prepared with safe water to loosen mucus. Keep the head slightly raised during sleep and avoid smoke, dust, and other irritants. Wash hands and consider reducing close contact while respiratory infection is possible. A pharmacist can help choose a suitable treatment for congestion or allergy, but mention pregnancy, high blood pressure, glaucoma, and regular medicines before using decongestants. Do not use leftover antibiotics.

Seek emergency care for severe difficulty breathing, chest pressure, confusion, fainting, blue or grey lips, or inability to stay awake. Arrange prompt assessment for shaking that is persistent, high or returning fever, severe facial pain, swelling around an eye, coughing blood, dehydration, or symptoms that are clearly worsening. People with lung disease, weak immunity, or significant pregnancy-related concerns should call a clinician earlier.

Ask whether the pattern fits allergy, a viral infection, sinusitis, or a chest problem; which nasal treatments are suitable; and whether examination or testing is needed. Describe mucus colour and amount, cough, breathing, fever readings, exposure to irritants, and how long the chills have lasted.