He Came In Holding a Cup of Ice Water

Quick answer: If hot drinks cause severe pain and holding cold water in your mouth relieves it, the nerve inside that tooth is dying or already dead. It is one of the few signs in dentistry that is close to conclusive on its own, and it means a root canal is needed.

The call

Ariel, 38, from Nofei Aviv, walked into the clinic carrying a plastic cup of ice water and sipping from it every twenty seconds or so. He apologised for it. He should not have — he had brought his own diagnosis with him.

He had been unable to drink tea for four days. A mouthful of hot soup on Friday night had, in his words, nearly put him on the floor.

What we found

Upper right first molar with a large old filling. Heat testing reproduced his pain instantly and severely. Cold gave brief relief. No response to electric pulp testing on that tooth while every neighbour responded normally. Slight tenderness to tapping. The x-ray showed deep recurrent decay under the filling and early widening at one root tip.

The mechanism behind the hot-hurts-cold-helps pattern is specific, which is why the sign is so reliable. As pulp tissue breaks down, bacteria produce gas inside the sealed pulp chamber. Heat expands that gas, pressure rises sharply against the remaining nerve fibres, and the pain is immediate and severe. Cold contracts the gas and reduces the pressure, so it genuinely relieves.

Note how this reverses the earlier stage of the same disease. A tooth with an inflamed but living nerve is exquisitely sensitive to cold and often indifferent to heat. Once the pulp becomes necrotic, the pattern flips. Patients who describe both — cold agony a few weeks ago, now heat agony and cold relief — have narrated the whole progression without realising it.

Anyone arriving with a bottle of cold water they keep sipping has, in practice, told you the diagnosis before sitting down.

What we did

Emergency pulpectomy the same morning. Anaesthetising a tooth in this state takes care: a necrotic pulp with an acidic inflammatory environment resists local anaesthetic, so we used a nerve block with supplementary infiltration and intraligamentary injection, and tested carefully before starting.

Access, complete removal of the necrotic contents from all four canals — this molar had an MB2 — thorough irrigation, calcium hydroxide dressing, sealed with a solid temporary.

The pain was gone when he left. He drank a hot coffee that afternoon and phoned to tell us so, which people do surprisingly often.

Canals filled two weeks later; crown six weeks after that.

The outcome

No further problems in three years. The tooth is crowned and the root tips are healthy on x-ray.

What to do if this happens to you

1. Cold water in the mouth is legitimate relief. Hold it over the tooth; you are reducing pressure, not damaging anything.
2. Avoid hot drinks and hot food entirely until you are treated.
3. Describe the pattern to the clinic when you phone. "Hot hurts, cold helps" gets you triaged correctly and quickly.
4. Take ibuprofen and paracetamol together if you can take both.
5. Do not wait it out. This stage is immediately before an abscess.
6. Do not expect antibiotics to solve it. There is no blood supply left inside the tooth for them to reach.

Hot drinks causing severe tooth pain? Ramat Beit Shemesh Urgent Dental Care treats this the same day. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh.

Based on real cases treated at the clinic. Names have been changed.