Sensitive gums cover a wide range of things, from a mild tenderness when you brush to gums that bleed, throb or ache. Some of it settles with a change of technique. Some of it is a sign of something a dentist needs to see. This is how to tell the difference.
Key points.
- Gum sensitivity and tooth sensitivity are different problems and often get treated as one.
- Bleeding is not normal, however common it is. Gums that bleed when you brush are usually inflamed.
- The most common causes are plaque-related inflammation, recession exposing the root surface, and hormonal change.
- Toothpaste does not treat gum disease. Where a sensitivity toothpaste helps, is with the exposed root surface recession leaves behind.
- Some of this needs a dentist rather than a different tube, and knowing which is the useful part.
What gum sensitivity actually feels like.
People describe it in a few distinct ways, and the description usually points at the cause.
- Tender and sore when brushing, with some bleeding. Most often inflammation from plaque sitting along the gumline.
- A sharp twinge at the gumline from cold or sweet things. Usually not the gum at all, but exposed root surface where the gum has receded. Still worth booking to see your dentist to check for caries.
- A dull, constant ache in one area. Worth attention. Localised, persistent pain is more likely to have a specific cause.
- Generalised tenderness that came on over weeks. Sometimes hormonal, sometimes a change in medication, sometimes progressing gum disease.
What causes it?
Plaque and gingivitis.
The most common cause by a long way. Plaque left along the gumline provokes an inflammatory response, and inflamed gum tissue is swollen, tender and bleeds easily. At this stage it is gingivitis, and it is reversible with better cleaning.1
Left alone, inflammation can progress to periodontitis, where the supporting bone is affected. That is not reversible, though it can be stabilised. This is the reason the advice about bleeding gums is always to act rather than wait.
Gum recession.
When the gum margin moves back, it exposes the root surface, which has no enamel on it. Recession is very common: a global systematic review and meta-analysis found it in a substantial share of adults, rising sharply with age.2
It is worth being careful about the usual explanation. “You are brushing too hard” is the standard line, and the evidence for it is weaker than its confidence suggests: an evidence-based review concluded there was no good evidence linking toothbrushing trauma to gingival recession.3 Brushing technique is still worth getting right, but recession is multifactorial, and gum position, previous inflammation, tooth alignment and orthodontic history all contribute.
Hormonal change.
Pregnancy, the menstrual cycle and menopause all alter how gum tissue responds to plaque, which is why gums can become tender and bleed more easily with no change in cleaning at all. We have written separately about sensitive teeth in pregnancy.
Something local and specific.
A piece of food trapped between teeth, an overhanging filling edge, a denture or appliance rubbing, a partly erupted wisdom tooth, or an ulcer. These tend to be one spot rather than everywhere, and they tend to have started suddenly.
When to see a dentist.
This is the most useful part of the page, so it is not buried at the bottom as a disclaimer. Book an appointment if any of these apply:
- Your gums bleed regularly when you brush or clean between your teeth, and it has not improved after two weeks of careful cleaning.
- You have pain that has lasted more than a couple of days, or that wakes you at night.
- A gum is swollen, or you can see or taste pus. That needs seeing promptly rather than at the next check-up.
- A tooth feels loose or has moved, or your bite feels different.
- Your gums are visibly receding, or teeth look longer than they did.
- You have an ulcer or sore patch that has not healed in three weeks. This one is not about sensitivity, and it should always be checked.
None of the above is a reason to panic, and most of it is straightforward to treat when it is caught early. But a toothpaste is not the answer to any of them, and a good proportion of people who go looking for a product for sore gums are in fact due a scale and polish and a conversation.
What settles at home.
For mild, generalised tenderness with a bit of bleeding and no red flags above, the boring advice is the advice that works.
- Keep brushing the area that is sore. This is counterintuitive and it is the single most important point. Gums bleed because they are inflamed, and they are inflamed because of plaque. Avoiding the tender area lets the cause build up.
- Two minutes, twice a day, with a fluoride toothpaste, last thing at night and one other time.6
- Clean between the teeth daily, with floss or interdental brushes. A brush cannot reach the surfaces where gum inflammation most often starts.
- Use a soft or medium brush and let the bristles do the work, angled towards the gumline rather than scrubbed across it.
- Spit, do not rinse. Rinsing with water immediately after brushing washes away the fluoride you have just applied.
- Give it two weeks. Inflamed gums that are being cleaned properly usually stop bleeding within that window. If they have not, that is your answer about whether to book.
Where a sensitivity toothpaste helps, and where it does not.
Being direct about this, because the category is not always: a sensitivity toothpaste does not treat gum disease. Gingivitis and periodontitis are managed by removing plaque and calculus, by you daily and by a dental professional periodically. No toothpaste substitutes for that.
What a sensitivity toothpaste does address is the consequence recession leaves behind. Once the gum has shrunk back, the exposed root surface is dentine, and dentine is threaded with microscopic channels running towards the nerve. That is why a receded area twinges at cold. Those channels are what a sensitivity paste works on, and it is a genuinely different job from treating the gum itself. Our piece on the two causes of sensitive teeth covers the mechanism.
There is some evidence that a potassium nitrate toothpaste can be used without detriment to gingival health, which matters mostly as reassurance that treating the sensitivity does not come at the gums’ expense.4
Exposed roots also decay more readily than enamel does, which is a good reason to keep fluoride in the routine rather than dropping it.5
Gums that bleed are asking to be cleaned, not to be left alone. That is the one instinct worth overriding.
Frequently asked questions.
Why are my gums sensitive all of a sudden?
Sudden gum tenderness is most often inflammation from plaque along the gumline, but it can also follow a change in your cleaning routine, a hormonal change, a new medication, or something local like trapped food or a rubbing appliance. If it is one specific spot, or lasts more than a couple of days, see your dentist.
Should my gums bleed when I brush?
No. Bleeding is common but it is not normal, and it usually means the gums are inflamed. Keep cleaning the area carefully, including between the teeth, and if the bleeding has not settled after about two weeks, book an appointment.
Can toothpaste cure gum disease?
No. Gum disease is managed by removing plaque and hardened deposits, by you every day and by a dental professional periodically. A toothpaste supports that routine; it does not replace treatment.
Is it gum sensitivity or tooth sensitivity?
A useful rule of thumb: soreness and bleeding while brushing point towards the gum, while a sharp twinge from cold, sweet or cold air points towards exposed root surface or enamel wear on the tooth. They frequently occur together, because recession causes both.
Does receding gum grow back?
Gum tissue does not grow back on its own. What can be done is to stop it progressing, by controlling inflammation and reviewing brushing technique, and to make the exposed surface more comfortable. Grafting is an option a dentist or periodontist can discuss in some cases.
Will a sensitivity toothpaste help sore gums?
It helps with the sharp sensitivity of an exposed root surface, which is what recession leaves behind. It does not treat inflamed or infected gum tissue, and it is not a reason to delay having sore, bleeding gums looked at.
For the exposed root surface that recession leaves behind, three actives plus fluoride in one daily toothpaste. Try S3 Daily Sensitive.
This article is general information and is not a diagnosis. Gum problems vary a great deal between individuals. If your gums bleed regularly, hurt, or have visibly receded, see your dentist.
