A white discharge from the gums and mouth after brushing is definitely indicative of an underlying pathology.
There are a few different possibilities when a symptom such as this presents itself.
One of the most common diseases in the world. In fact, it is estimated that a large majority of the population has gum disease at least to a mild degree. Gum disease can present in a varying of different clinical pictures, depending upon the person's genetics and the strength of the immune response.
Pus production inside the gingival sulcus is a common finding in gum disease. This pus is formed as the body's defense fights with the bacteria that are trying to colonize the gums. This is an ongoing process and that is why the presence of pus can occur at almost any stage of gum disease.
It can occur when the gums are only slightly affected or it can happen when the gum disease has progressed to full-blown chronic periodontitis, where the bone surrounding the teeth is being destroyed.
The collection of gum in the gingival sulcus is easily discharged on applying pressure. This kind of pressure can be applied to the gums unwittingly during brushing or even chewing food.
The presence of an abscess with a draining sinus in the mouth can also result in a similar symptom. In this case, pressure application can also cause a discharge of pus into the oral cavity.
There are certain systemic conditions, such as diabetes, which predispose an individual to developing abscesses inside the mouth. It could also form due the presence of a severely decayed tooth.
This kind of abscess usually presents with a swelling near the offending tooth. The presence of a large carious lesion will also make this easy to identify.
This is uncommon but can occur. There are a number of different compounds that can cause an extreme allergic reaction in commercially available toothpastes, mouthwashes, even gums and lozenges.
If the symptoms started to appear after a recent change in dental hygiene products, you should immediately stop using that product. Such an allergic reaction will also cause mucosal damage that will make hot and spicy food in particular unbearable.
The treatment for gum disease depends upon the severity it has reached when diagnosed. Often the disease can progress quite a lot before clinical symptoms start appearing. A thorough scaling and root planning will be necessary and even gum surgery might have to be performed in certain areas.
In case of a decayed tooth causing an abscess, the treatment will include either disinfection via root canal treatment or an extraction if the tooth is beyond saving. Adjunctive antibiotics will almost certainly be needed.
An investigation into the possibility of any underlying systemic condition should also be done.
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