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The entire cold is usually over all by itself in about seven days, probably with a few lingering symptoms for another week. If it lasts longer, you should consider another problem, such as a sinus infection or allergies that cause similar symptoms. To understand the difference better, you should know that we define the common cold as a short-term, contagious, viral illness with nasal stuffiness, sneezing, runny nose, throat irritation, and little or no fever. The diagnosis is based on identifying the appropriate symptoms, exposure, and time course. 
Although we know this, it is sometimes difficult to distinguish a cold from other problems such as allergies, influenza, strep throat, or sinus infections. A history and physical exam, sometimes with supporting lab work, will usually make the distinction and establish an appropriate diagnosis.
How to Get Rid of the Common Cold Quickly?
It is most important to know that we should not use antibiotics to treat a common cold.
Thick yellow or green nasal discharge is not a reason for antibiotics, unless it lasts for 10 to 14 days without improvement. In this case, the diagnosis could be sinusitis, so your doctor should perform a check-up.
Most cold treatments aim to control troublesome symptoms the patients are experiencing. New anti-viral drugs could make runny noses completely clear up a day sooner than usual. They are also able to begin easing the symptoms within a day. It is unclear whether the benefits of these drugs outweigh the risks.
Many people use chicken soup for treating common respiratory illnesses, as they have been doing at least since the 12th century. Research published in the October 2000 explains why this home remedy has held on for so long. The only answer is — because it may really help improving common cold symptoms. In addition to the infection-fighting benefits of the heat, hydration, and salt, these researchers looked at the direct biologic activity of the soup itself. 
There are also many other home remedies that are popular treatments for the common cold, and these include vitamin C, zinc supplements, and echinacea. However, some home remedies are not safe for some people as they may:
- Cause side effects or allergic reactions.
- Change the way other medicines work. 
To assist your body’s defenses and to help relieve certain symptoms, we suggest only these tips without antibiotic usage. The reason is that antibiotics have no effect on viruses, while our body contains both harmful and helpful bacteria, so antibiotics may have an unwanted side-effect on these helpful bacteria. Bacteria eventually become resistant to antibiotics, after they have been exposed to them often enough. That is why you should try to fight common cold with proven ways and without antibiotics.