Why Do My Gums Hurt? Identifying Causes and Finding Relief

In this article:

• Why do my gums hurt in one spot?

• Why do my gums suddenly hurt?

• Why do my gums hurt when I brush my teeth?

• Difference between a canker sore and a gum infection

• Finding the best over-the-counter product for gum pain relief

• Frequently asked questions about gum pain

Key takeaways:

• Localized pain causes: sharp pain in one spot often results from mechanical trauma (like a trapped popcorn kernel) or a periodontal abscess.
• Sudden soreness: widespread gum pain can be caused by hormonal fluctuations that increase vascular permeability, allergic reactions, or systemic viral infections like the flu.
• Brushing trauma: aggressive brushing causes toothbrush abrasion, leading to immediate soft-tissue bruising and long-term gingival recession.
• Paying attention: distinguishing between a self-limiting sore and an infection is important to choose the right treatment.

Localized pain is often a result of mechanical trauma, a subgingival foreign body, or a localized periodontal abscess (gum boil). It can also be the result of gum disease, such as gingivitis. These "hot spots" signify an acute concentration of bacteria or physical irritation that has breached the oral mucosa. 

Sudden, widespread pain often points to an acute inflammatory response or a recent change in your lifestyle or health. You might find yourself surprised if the discomfort appeared overnight, but this can be triggered by:

• Endocrine fluctuations: spikes in progesterone increase vascular permeability, making the gums hyper-reactive to the plaque biofilm.

• Contact stomatitis: an allergic reaction to a new chemical agent that irritates the delicate oral mucosa.

• Illness: viral infections like the flu can sometimes cause the gums to feel achy and tender.

Experiencing pain while brushing or flossing often signals an issue, such as a localized problem, developing gum disease, or incorrect way of brushing. The discomfort is typically caused by friction against tissue that is already sensitive or inflamed, making any contact painful.

It is important to distinguish between a self-limiting sore and a spreading infection to choose the right treatment.

The difference between a canker sore and a gum infection is usually visible:

• A canker sore (aphthous ulcer) typically appears as a small, round ulcer with a white or yellow center and a red border; it is painful but not contagious and usually heals in a few days to a week.

• Gum infection, however, is usually not painful and it involves broader redness, swelling, and bleeding gums. Infections often stem from plaque buildup and will not resolve without improving your hygiene or seeing a dentist.

While you wait for a dental appointment, you can manage gum discomfort using topical or systemic solutions.

The best over-the-counter products for gum pain relief often include:

• Benzocaine-based topical gels for localized numbing.
• Antimicrobial mouthwashes to reduce the bacterial load.
• Anti-inflammatory medications to reduce swelling.

When using over-the-counter products, always follow the package instructions carefully to avoid side effects and complications. Using too much benzocaine, for example, can cause sloughing of the gum tissue and, in rare cases, serious systemic reactions. 

Keep in mind that these solutions are only temporary. For a permanent reversal of the problem, you should consult your dentist to determine the best course of action.