Why a healthy shed lifts away in one piece
A snake grows a new layer of skin underneath the old one, and just before shedding, fluid builds between the two layers. That is the dull, blue-eyed phase keepers call being in blue. Once the fluid reabsorbs, the old skin should split at the lips and peel back as the snake rubs along rough surfaces, ideally coming off in a single inside-out sock with the clear eye caps included. Anything that dries that separating layer too early makes the old skin cling in patches instead, a problem keepers call dysecdysis, and the commonest reason is simply air that is too dry for that species at shed time.
Check humidity, water and rubbing surfaces first
Work through the enclosure before worrying about illness. Confirm the humidity with a digital hygrometer placed at the snake's level, not a dial gauge stuck high on the glass, and raise humidity during the shed cycle for species that need it. Offer a water bowl wide and stable enough for the whole snake to coil inside, because a snake that can soak softens its own old skin. Add something rough to push against, such as cork bark, a textured branch or a rough stone, and provide a humid hide: a lidded box with one entrance hole, lined with damp sphagnum moss and placed on the warm side. Many stuck sheds resolve with that one addition, because the snake can sit in saturated air for hours before trying again.
Helping this shed along, safely
For skin that is already stuck, a shallow soak in lukewarm water, barely warm to your wrist and deep enough to cover the body without forcing constant swimming, softens the old layer over twenty to thirty minutes. Afterwards, let the snake crawl repeatedly through a damp towel held loosely in your hands; the gentle friction lifts loosened edges without tearing anything. An overnight stay in the humidity box works the same way for stubborn patches along the belly and tail. What you must never do is peel. Pulling at stuck skin can tear the fresh skin beneath, and skin retained over the eyes, the clear spectacles a snake sheds with the rest, should never be worked at with fingers, tape or tools.
When a bad shed points to something bigger
One poor shed after a dry spell is usually an enclosure problem. Sheds that keep failing even with correct humidity deserve a closer look: check for mites, which show as tiny dark specks moving between the scales or drowned in the water bowl, and for old scar tissue, burns or wounds where the skin always catches. Retained skin around a tail tip can tighten as it dries and slowly cut off circulation, so a tail tip that keeps its old rings needs attention rather than patience. Wheezing, mucus around the mouth, or food refusal alongside bad sheds moves the situation out of routine home care altogether.
Getting a vet involved
Book an exotics vet if eye caps are retained, if the tail tip is holding old skin, if sheds fail repeatedly despite a humid hide and correct readings, or if you find mites, mouth sores or breathing sounds. Take the shed skin itself if you still have it, plus your temperature and humidity readings, because they tell the vet how much of this is environmental. Keeping each shed date, humidity fix and vet note together in your snake's Pet Passport on KinsLe means the pattern across several sheds is there to show, not something you have to reconstruct from memory.