Is it a symptom or a condition?

A symptom is an indication or an effect that a condition, disorder or disease has on you. For example, headaches, sore throat, runny nose, aching muscles.

A condition is a collection of symptoms and is the name given to the disease or disorder that you have, such as flu, gastroenteritis, tonsillitis and so on.

For example, feeling sick (nausea) is a symptom of conditions such as food poisoning, dehydration, travel sickness and ear infection.