Headache vs loss of smell: how the symptoms differ

Headache causes head pain, while loss of smell changes scent perception; either symptom can need assessment when sudden, severe, or accompanied by warning signs.

A headache may feel like pressure, throbbing, tightness, or pain around the face. Loss of smell may be partial or complete and can also make food taste less noticeable because flavour depends heavily on smell. Nasal blockage, a recent respiratory illness, migraine, medicines, or an injury can provide useful context, but they do not replace an individual assessment.

Use the headache pathway when head pain is the symptom that is limiting you. Note whether pain began gradually or abruptly, where it is felt, what you were doing at onset, and whether light, sound, movement, nausea, fever, neck stiffness, weakness, or vision changes occur with it. Regular meals, fluids, rest, and reducing screen or noise exposure may be reasonable comfort measures for a familiar mild headache, provided no warning signs are present.

Use the loss-of-smell pathway when you cannot detect familiar scents, notice distorted smells, or find that flavour seems muted. Keep safety in mind: use working smoke alarms, check food dates and appearance, and avoid relying on smell alone to judge a possible gas leak. A clinician can examine the nose and discuss the timing of the change, congestion, allergy symptoms, recent illness, head injury, and medicines.

Seek urgent medical help for a sudden, extremely severe headache; headache after a significant head injury; or headache with fainting, confusion, seizure, weakness, trouble speaking, a new vision problem, fever with a stiff neck, or persistent vomiting. Prompt assessment is also appropriate when loss of smell follows a head injury, occurs with new neurological symptoms, or comes with severe facial swelling or breathing difficulty. These warning signs matter because they can point to problems needing timely examination.

Headache and loss of smell can occur at the same time, particularly when nasal symptoms, an infection, or migraine features are present. Treat the combination as a reason to record the sequence: did congestion begin first, did the headache start before the smell change, and are symptoms improving or worsening? If neither symptom is clearly the main issue, choose the concern that is most disruptive and bring the full symptom timeline to the appointment.

A clinician will usually start with the pattern and onset, then consider examination findings and relevant medical history. For headache, the discussion may include prior episodes, blood pressure concerns, sleep, stress, recent illness, and medicines. For smell change, it may include nasal obstruction, allergies, sinus symptoms, recent infections, smoking exposure, injury, and medication effects. Bring a list of medicines and note any self-care measures that changed the symptoms.