Common cold in medical terms: what it means

A cold usually causes a blocked or runny nose, sneezing, sore throat and cough. The illness spreads through respiratory droplets and contaminated hands or surfaces. Symptoms can change over several days as the immune system clears the virus. A cough may linger after nasal symptoms improve.

A cold is different from influenza, allergy symptoms and bacterial conditions. A blocked nose or cough alone cannot identify the cause. Irritation may also affect the ears or sinuses, while breathing symptoms lower in the chest can point toward acute bronchitis.

Rest when you feel unwell, drink fluids regularly and use warm drinks or soothing foods if your throat is irritated. Saline nasal drops or spray can loosen mucus, and a humidified room may make dry air more comfortable. Wash hands and avoid sharing cups, towels or utensils while symptoms are active.

Use medicines only as directed on the label or by a pharmacist. Combination cold products can contain overlapping ingredients, so check the contents before taking more than one product. Antibiotics do not treat the viruses that cause ordinary colds.

Seek prompt medical care for difficult breathing, chest pain, confusion, dehydration, severe weakness or a blue or grey colour around the lips. Arrange an assessment when symptoms are worsening rather than easing, a high temperature persists, or ear pain or facial pain becomes marked.

Ask whether your symptoms fit a cold, which medicines are suitable for you, and what change would mean you need review. Mention long-term lung disease, immune problems, regular medicines and any recent exposure to someone with a respiratory infection.