A common cold is an infection of the upper respiratory tract. Although it is usually harmless, it certainly may not feel that way. Since there are more than 200 viruses that can cause a common cold, the symptoms tend to vary greatly. Most adults suffer from a common cold two to four times per year. Children, especially preschoolers, may have a common cold as many as six to ten times annually.
The rhinovirus is the most common virus causing the infection, and it is highly contagious, meaning it can be easily spread from one person to another. A cold virus enters the body through the mouth or nose and can spread through droplets in the air when someone who is sick coughs, sneezes or speaks to you. A cold virus can also be spread by direct contact with someone who has a cold or by using shared objects, such as telephones, toys, or utensils. Touching the nose, mouth, or even eyes after such contact or exposure, may lead to a cold.
Nasal allergies and colds share many of the same symptoms, which may make it difficult to identify the cause of the ailment. Signs and symptoms of a common cold usually appear about one to three days after exposure to a cold virus and may include:
Colds can last up to about 2 weeks, and are contagious. During a cold, the discharge from the nose may become thicker and yellow or green in color as a common cold runs its course. It is uncommon to see a high fever with a cold. Nasal allergy symptoms can be distinguished from colds by the fact that they usually last longer, and cannot be spread.
There is no cure for the common cold. Fortunately, most patients feel better in about a week or two. If the symptoms of a common cold have not improved in that time, bacterial complications should be ruled out and further medical evaluation is necessary to determine the cause of the patient’s continued symptoms.
The goals of treatment of the common cold are to make the patient feel better and to help fight off the virus. Since the infection is caused by a virus, antibiotics are ineffective. Although over-the-counter cold medications won’t cure a common cold or make it go away any sooner, they often reduce the symptoms. However, most over-the-counter cold medications have side effects and it is wise to read the medication labels carefully. Most heavily advertised over-the-counter cold and flu medications contain multiple drugs to treat many symptoms; therefore their use may result in unnecessary over-treatment. A physician should be consulted before using over-the-counter medication for children under the age of 14.
These are effective in reducing fever, sore throat, body aches, and headaches. It is important to read the instructions carefully and to stay within the recommended doses. Aspirin should never be given to children as it has been associated with Reye’s syndrome, a rare but potentially fatal illness. Gargling with salt water (1/2 teaspoon of salt in 1 cup of water) is effective in reducing a sore throat.
Good nutrition is essential for resisting and recovering from a cold. It is important to eat a well balanced diet. Consume the recommended dietary allowances for vitamin A, vitamin B complex (vitamins B-1, B-2, B-5, B-6, folic acid) and vitamin C, as well as the minerals zinc and copper. If the diet does not provide an adequate amount of these vitamins and minerals, supplements should be added as needed.
The more rest and sleep the better; this allows the body to heal itself faster. Increasing water consumption is very important since a lot of fluid is lost during a cold. Hydration makes the mucus flow more freely and helps with relieving the congestion.
Decongestants fight nasal congestion by temporarily constricting the blood vessels. By reducing the size of the blood vessels, the nasal mucosal swelling, and therefore the nasal congestion, is reduced. Decongestants are available in pill form as well as nasal sprays. Please be aware that over-the-counter nasal decongestant sprays can cause a “rebound effect” when used longer than the recommended period. This results in worsening of the nasal congestion after the medication has been stopped. In addition, decongestant pills may increase blood pressure and heart rate. Decongestants should not be taken without first checking with a physician if the patient has heart disease, high blood pressure, prostate problems, diabetes, or thyroid problems.
Over-the-counter saline nasal sprays help reduce nasal congestion. They are effective, safe and nonirritating. Saline nasal sprays provide moisture to the nasal passages, especially during cold or dry seasons. When the nasal passages are dry, stagnation of mucus and mild nasal crusting may occur. Thus, viruses may not be cleared from the nasal passages in a timely fashion and viral infections can develop under these crusts. Saline sprays clean the nasal passages of crusts and mucus and also help the natural cleaning system of the nasal passages.
Over-the-counter cough suppressants can be helpful if the cough is so severe that it interferes with sleeping or talking. If this is not the case, do not suppress the cough, because coughing removes mucus and germs from your throat and lungs. Coughs associated with a cold usually last less than two to three weeks. If a cough lingers longer than that, you should see your doctor.
There is no effective vaccine for preventing the common cold. However, certain precautions will help slow the spread of cold viruses: