7 signs you should see a doctor about your cold or flu

While most cold and flu symptoms just have to be endured, some can lead to serious health problems. Discover seven signs it's time to go see a doctor.

A runny nose or congestion can make your breathing a little laboured. If you find yourself wheezing and unable to catch your breath, though, you could have a serious infection, asthma or heart problems.

Chest pain is probably the most serious symptom that people ignore. If you have recurring chest pain, see a health provider as soon as possible.

• If you have severe pain on the left side of your chest, or the pain is so severe you can't function, you might be having a heart attack.
• Call for emergency medical services immediately.

Fever may seem like a sign of serious illness, but high temperatures are common and usually not serious.

• Keep using the thermometer, though, as fevers higher than 39.4 C for adults could warrant medical attention.

Again, minor fevers usually don't warrant much concern. On the other hand, a temperature higher than 37 C that persists for several days could indicate an infection or other chronic health issue that needs treatment.

A cold can steal your appetite and the flu can upset your stomach. So you may eat much less while sick or not even want to look at food.

• Water is a different matter. If you can't take in fluids or vomit when you drink, you risk serious dehydration. Get medical attention quickly.

Aches and pains are part of minor illnesses. Pay special attention to a sore throat, however.

• The throat is a common site for serious infections. If you have difficulty swallowing or it hurts your throat to eat, see a health provider.

There are many reasons a cough could last for days, including nasal drip or allergies. A persistent cough can indicate more serious problems too, so if a cough sticks around for two weeks or more, you should have it looked at by a health professional.

Everyone has their own tolerance for pain and putting up with symptoms. One good rule of thumb to keep in mind: if symptoms persist and don't improve, it's time to seek medical attention.