If the symptoms of nasal allergies and common colds do not improve after 10 days, they can lead to an infection in the paranasal sinuses, a condition more commonly known as sinusitis.
Easy to treat
To calm the headaches caused by sinusitis, use warm washcloths or cloths on the face as well as painkillers or anti-inflammatories. Cold air humidifiers and saline solution nasal sprays can also help reduce nasal congestion. If bacteria are the cause of sinusitis, your physician will prescribe you an oral antibiotic and provide you with treatment recommendations.
Viruses and nasal congestion
When you are sick with a virus, your nasal cavities and the lining of your nose become inflamed, producing more nasal discharge than normal. At first, this discharge is clear and watery, but after a few days, it can become thick and turn a yellow color until it nears the end of congestion and becomes clear again. Symptoms are at their worst between the third and fifth day. After this point, the severity of symptoms should reduce. (It may be of your interest: Sinusitis:When a cold becomes sinusitis).
10 days is the maximum duration of a cold. Any period longer than this may LEAD TO complications.
When inflammation persists for longer than 10 days, the opening of your paranasal sinuses becomes blocked, which is why your nasal mucus becomes trapped and bacteria, fungi or viruses begin to grow, causing sinusitis. Patients may have a fever for several days and may experience severe headaches in the area behind or surrounding their eyes.
5 is the youngest age in which a person can develop sinusitis, as the frontal sinuses do not develop until this age.
Source: American Academy of Pediatrics