My Snake Is Wheezing or Clicking
You hear an audible wheeze, click, whistle, or rattle when your snake breathes, or notice it holding its head raised at an unusual angle, breathing with its mouth open, or blowing bubbles of mucus from its nose or mouth.
Bacterial respiratory infection (pneumonia)
See a vet todayThis is the leading cause of audible breath sounds in snakes and is most often linked to husbandry that has fallen out of range — temperatures too low, humidity chronically wrong for the species, or poor ventilation — which suppresses immune function and lets opportunistic bacteria take hold in the lung. Left untreated it progresses from a mild click to visible mucus, open-mouth breathing, and can become fatal, so this is never a 'wait it out' symptom once breath sounds are clearly audible.
Recent shed or normal breathing variation
Routine — monitor and adjust husbandryVery occasionally a snake makes a brief, quiet sound during or immediately after a shed as residual moisture clears from the nasal passages, or simply has an individually louder breathing pattern with no other symptoms. This is uncommon and should be treated as the less likely explanation rather than the default assumption — genuine respiratory sounds rarely resolve within a day on their own.
Incorrect temperature or humidity stressing the immune system
Even before a full infection sets in, chronically wrong temperature or humidity for the species stresses a snake's immune system and is very often the underlying reason an infection developed in the first place. Verifying and correcting the enclosure's actual readings matters regardless of what else is going on, since untreated husbandry problems will simply cause reinfection after treatment.
Aspirated substrate or foreign material
See a vet todayLoose particulate substrate, especially in an enclosure where a snake has recently struck at or swallowed a substrate particle along with prey, can occasionally be aspirated into the airway and cause sudden-onset noisy breathing. This needs prompt veterinary assessment since it can obstruct the airway rather than resolving with husbandry correction alone.
Mouth rot (infectious stomatitis) spreading to the respiratory tract
Mouth rot that starts as visible redness, swelling, or cheesy discharge around the mouth can, if untreated, spread further into the respiratory tract and complicate a straightforward infection into a harder-to-treat combined case. Check the mouth and gum line for these signs alongside any breathing changes.
Mite infestation causing irritation
A heavy snake mite infestation can cause enough irritation and stress around the head and nostrils to produce coughing-like sounds or visible discomfort, distinct from a true lower respiratory infection. Check closely around the eyes, chin, and under scales for small moving black or reddish dots, especially after soaking, which drives mites to the water's surface.
Overfeeding or obesity restricting lung capacity
Routine — monitor and adjust husbandryA significantly overweight snake, or one that has just eaten a meal too large relative to its body, can show mild labored breathing purely from reduced space for lung expansion, without infection. This resolves as digestion completes or with a corrected feeding schedule going forward, but is worth distinguishing from true infection by its context and timing.
Audible breath sounds in a snake deserve to be taken seriously by default, because unlike several other symptoms on this site, the most common explanation here (bacterial respiratory infection) is also one of the more urgent ones — this is not a symptom where 'watch and wait for a week' is the right default response the way it can be for, say, mild appetite loss.
Start by actually listening carefully, ideally with the snake calm and not moving, for a full minute or two: is there a distinct click, wheeze, whistle, or rattle on inhale or exhale, or is the head held at an unusual raised angle with visibly labored, open-mouth breathing? The louder and more consistent the sound, and the more visibly effortful the breathing looks, the more urgent the situation — a single very faint click heard once is a different picture from a snake audibly struggling with every breath.
Check for accompanying signs next: mucus or bubbles around the nostrils or mouth, discharge or swelling around the gum line (pointing toward mouth rot), reduced appetite or activity alongside the breathing change, or small moving dots on the skin or in the water bowl after a soak (mites). Each of these narrows down which of the possible causes is most likely without requiring a vet visit to check.
Verify enclosure temperature and humidity with an actual thermometer/hygrometer regardless of what else you find, since incorrect husbandry is very often either the direct cause or the reason an infection was able to take hold in the first place — correcting husbandry alone, without veterinary treatment, will not resolve an established bacterial infection, but failing to correct it will make any treatment less likely to hold.
There is genuinely very little role for extended home monitoring with this particular symptom compared to most others on this site. A bacterial respiratory infection in a reptile progresses over days, not hours, but it does not resolve on its own, and delaying treatment while 'seeing if it gets better' routinely means a snake arrives at the vet sicker and requiring more aggressive treatment than if seen at the first clearly audible sound.
The signals that make this an urgent same-week (not same-day-emergency, but not a 'monitor for a month' situation either) vet visit: any audible click, wheeze, or whistle that persists beyond a single observation, open-mouth breathing, visible mucus or bubbles at the nostrils or mouth, a raised or unusually held head position during breathing, or any of the above alongside lethargy or appetite loss. If breathing looks acutely labored or the snake seems to be struggling to get air at all, that crosses into same-day emergency territory rather than 'this week.'
Preventing this going forward
Verify and log enclosure temperature and humidity for the specific species with an actual digital thermometer/hygrometer, not a guess or a cheap analog gauge — since incorrect husbandry is the single most common underlying driver of respiratory infection, getting and keeping these numbers right is the highest-leverage prevention step available.
Ensure adequate ventilation in the enclosure design itself; a fully sealed setup that holds humidity well can also trap stagnant, bacteria-friendly air if it has no meaningful airflow, which is a less obvious but genuine contributor to respiratory issues in high-humidity species specifically.
Quarantine any new snake for a minimum of 60-90 days away from an existing collection's airspace and equipment before introducing it, since respiratory infections and mites are both readily transmissible between snakes sharing a room, let alone an enclosure.
Address any mite infestation immediately and thoroughly rather than partially, since incomplete mite treatment allows reinfestation and the ongoing irritation itself can contribute to a weakened, infection-susceptible state.
Avoid loose particulate substrates in enclosures where a snake actively strikes and swallows prey close to the substrate surface, or feed in a separate, bare-bottomed container, to reduce the (uncommon but real) risk of substrate aspiration.
Keep feeding portions and frequency appropriate to body size and species, since chronic overfeeding and obesity compound respiratory strain on top of whatever else may be going on, and are entirely within a keeper's control to prevent.
This is general educational care information, not veterinary diagnosis. For a sick or injured animal, see a qualified exotic-animal vet promptly — especially for anything acute (not eating combined with lethargy, breathing changes, bleeding, or any sudden behavior change). Nothing on this page substitutes for an in-person exam.