An adult can expect 2-4 colds a year, and a young child about 3-8 colds a year. Usually, symptoms peak after 2-3 days and then ease off over a few days. A cough sometimes lingers for up to three weeks. There is no magic cure! Treatment aims to ease symptoms. The main treatment is to take paracetamol or ibuprofen which can ease fever, aches and pains.
What is a cold and what causes it?
A cold is an infection of the nose and upper airways caused by a virus. Many different viruses can cause a cold. This is why colds recur, and immunisation against colds is not possible. Children tend to have more colds than adults, as adults have built up immunity to many viruses. Adults have an average of 2-4 colds a year. Young children have an average of 3-8 colds a year.
What are the symptoms of a cold?
Symptoms typically peak after 2-3 days and then gradually ease off. Symptoms have usually gone within a week but, in some cases, they can take three weeks to clear completely. In particular, a cough may linger for up to three weeks, often when other symptoms have gone. The symptoms, particularly cough, tend to be worse and last longer in smokers compared with nonsmokers. A child who lives with smokers has an increased risk of developing coughs and colds.
What are the treatments for a cold?
There is no magic cure for the common cold! There is no treatment that will shorten the length of the infection. Treatment aims to ease symptoms whilst your immune system clears the virus.
Note: antibiotics do not kill viruses, so are of no use for colds. The most useful treatments are:
What about cold remedies?
You can buy many other cold remedies at pharmacies. There is little evidence that they do much good, but some people find them useful. For example, a decongestant nose spray may help to clear a blocked nose. But remember, cold remedies often contain several ingredients. Some may make you drowsy. This may be welcome at bedtime if you have difficulty sleeping when you have a cold. However, do not drive if you are drowsy. Some contain paracetamol, so be careful not to take more than the maximum safe dose of paracetamol if you are already taking paracetamol tablets.
In March 2009 an important statement was issued by the Medicines and Healthcare products Regulatory Agency (MHRA) which says:
"The new advice is that parents and carers should no longer use over-the-counter (OTC) cough and cold medicines in children under 6. There is no evidence that they work and can cause side effects, such as allergic reactions, effects on sleep or hallucinations.
For 6 to 12 year-olds these medicines will continue to be available but will only be sold in pharmacies, with clearer advice on the packaging and from the pharmacist. This is because the risks of side-effects are reduced in older children because they weigh more, get fewer colds and can say if the medicine is doing any good. More research is being done by industry on how well these medicines work in children aged 6-12 years."
Note: paracetamol and ibuprofen are not classed as cough and cold medicines and can still be given to children.
A note of caution
If you do use a decongestant nasal spray, do not use it for more than a few days. It can have an immediate effect to clear a blocked nose. However, the effect does not last very long. But note: if you use one for more than 5-7 days, a rebound severe congestion of the nose may develop.
Some recent research developments
Research studies suggest that:
It is not clear if these are likely to become routine treatments or if they are still in the realms of research. See the references at the end for details of these.
Are there any possible complications from a cold?
Most colds do not cause complications. A cold may trigger coughing, wheezing and shortness of breath in people with asthma or other lung diseases. Sometimes the infection travels to the chest, sinuses, or ears. Bacteria may thrive in the mucus so some people develop a secondary bacterial infection of the chest, ears or sinuses. Therefore, consult a doctor if symptoms do not start to ease within a few days, or if you suspect that a complication is developing. In particular, symptoms to look out for that may mean more than just a cold include:
Can colds be prevented?
Prevention is difficult. Many viruses can cause a cold. This is why it is difficult to produce a vaccine. Also, many viruses that cause colds are in the atmosphere, which you cannot avoid. However, the following are sensible suggestions that may minimise the risk of catching a cold or of passing one on if you have one:
Basically - common sense and good hygiene may prevent passing on some colds. There is no good evidence that vitamin or mineral supplements can prevent the common cold.
Exercise may help too
An interesting research study (cited below) concluded that people who exercise regularly are less likely to get respiratory infections such as a cold. The study of 1,002 people found that during the 12-week winter study period, those who exercised on five or more days a week had a greatly reduced chance of developing a cold compared with those who did very little exercise. And, if someone who exercised regularly developed a cold, there was a good chance that symptoms would be less severe than someone with a cold who did little exercise. One theory why this may be so is that exercise may provide a boost to the immune system, which may help us to combat infections like the common cold.