Leopard geckos are ground hunters with small, replaceable teeth set along both jaws, and early dental trouble usually starts quietly at the lips and gum edges rather than with a dramatic refusal to eat. Because this species is most active at dusk, the earliest clues appear during evening feeds: a hesitation that was not there last week, or a mouth corner that looks different when the gecko yawns after a meal.
Signs Along the Lips and Gums
Look closely at the mouth corners, where crusted material or a small swollen bump often appears first. The gum line may look redder or puffier than the pale, tidy edge of a healthy mouth, and one side of the jaw can appear subtly fuller when viewed from above. Drooling, repeated lip licking, or a mouth that rests slightly open are also early flags. Some geckos paw or rub the side of the face against a hide edge, a behaviour that is easy to dismiss as shedding behaviour unless it repeats across several days outside a shed.
What Changes at Feeding Time
A leopard gecko with mouth discomfort often still stalks prey with real enthusiasm, tail raised and eyes fixed, then falters at the bite. Insects may be seized and dropped, chewed on one side only, or swallowed more slowly with exaggerated jaw movements. Soft-bodied prey might still go down while harder items are abandoned, a pattern worth writing down because it points at discomfort rather than lost appetite. If the gecko starts missing strikes it used to land cleanly, consider the mouth as well as eyesight, since pain can shorten the final lunge.
Home Checks That Stay Gentle
Let the gecko walk onto your hand as usual and use the moment to view the mouth line from both sides under a bright lamp. A phone video of a full feeding session, reviewed slowly afterwards, reveals more than any attempt to hold the jaw open, which risks injury and a dropped tail. Note the warm-side temperature and recent shed dates beside your observations, because poor sheds and cool conditions can muddy the picture. Weigh weekly if the gecko tolerates it, since a thinning tail base confirms that less food is really going in.
Thresholds for Booking the Vet
An exotics vet should see any leopard gecko with visible mouth swelling, thick or cheesy-looking discharge, bleeding, or a jaw that no longer closes evenly. Appetite loss lasting beyond a couple of missed feeds alongside mouth changes, rapid tail thinning, or lethargy in a normally curious gecko all move the visit from routine to prompt. Bring a fresh faecal sample if you can collect one, plus your feeding log, because a thorough vet work-up considers parasites and husbandry alongside the mouth itself.
Turning Observations Into Evidence
For each check, record which insects were offered, how many were finished, and exactly where on the mouth you saw redness or crusting. Keep one consistent reference photo, taken from above with the gecko on the same surface, so jaw symmetry can be compared honestly week to week. That kind of record shortens the first appointment and makes follow-up visits measurable rather than impression-based. Filing those feeding logs, mouth photos, and vet notes together in KinsLe's Pet Passport keeps this gecko's dental story complete and easy to hand over.