Common Giant Millipede Health Issues
Giant millipedes are hardy, and nearly every serious issue in this species traces back to substrate moisture, either too little or, in a couple of specific cases, conditions that stay too consistently wet.

Common Giant Millipede Health Issues
Giant millipedes are hardy, and nearly every serious issue in this species traces back to substrate moisture, either too little or, in a couple of specific cases, conditions that stay too consistently wet. Getting humidity right from the start, covered in our Giant Millipede tank setup guide, prevents most of what follows.
Dehydration
The number one cause of death in this species. Watch for a shriveled, sluggish appearance and dry, cracking segments along the body. Caused by insufficient humidity or substrate that isn't holding moisture properly. Manageable early, raise humidity, moisten the substrate more deeply, and provide a shallow water dish. Prevention through consistent humidity matters more here than any at-home fix once dehydration is already advanced.
Failed or Incomplete Molt
Often fatal. Caused by low humidity, poor nutrition, or disturbance during the vulnerable molting process. Never assist a molt or attempt to remove shed skin yourself, this can cause real harm. The only effective response is maintaining correct humidity beforehand and leaving your millipede completely undisturbed during the process itself, our Giant Millipede handling guide covers why a burrowed, seemingly unresponsive millipede is very often just molting rather than in distress.
Mite Overgrowth
Not every mite on a pet millipede is a problem. Many species living alongside a captive millipede are harmless and genuinely part of a normal bioactive setup, it's only a heavy infestation, usually clustering visibly near the head or legs, that signals real trouble.
A heavy infestation shows up as unusually frequent cleaning behavior, thrashing, or visible mite clusters concentrated near the head or legs. Gently wipe affected areas with a damp cotton swab if needed. Never use pesticides or mite sprays, these are genuinely toxic to millipedes and can kill the animal you're trying to help. Caused by substrate that's too wet combined with poor ventilation.
Exoskeleton Injury
Cracks or lost legs and antennae, usually from a fall or a difficult molt. Minor damage often corrects itself at the next molt. A major crack calls for isolating the animal in a clean, simplified hospital enclosure while it recovers.
Necrotic Lesions and Soft Exoskeleton
Dark lesions point to substrate that's swampy and poorly ventilated, worth correcting immediately. A soft, weak-feeling exoskeleton points to calcium deficiency, add a genuine calcium source like cuttlebone or crushed oyster shell to the enclosure, not chalk, which isn't an appropriate calcium source for this species.
The Husbandry Pattern Worth Remembering
Low humidity causes both the dehydration and failed molts that account for most serious health problems in this species. Excess wetness combined with poor airflow invites both mite overgrowth and necrotic lesions instead. And falls, entirely preventable through careful handling, cause most physical injuries. Balanced humidity, more than anything else, is the real key to this species' health.
For what all of this costs to manage, including the calcium and hygrometer items mentioned above, see our Giant Millipede cost guide. If you're comparing this species against other exotic pets, see Jackson's Chameleon, Canary, Giant Millipede & Corydoras Catfish compared, or browse the rest of our Invertebrates care guide category.
Sources & Further Reading
- The Tye-Dyed Iguana: Giant Millipede Health
- Tree of Life Exotic Pet Medical Center: Giant Millipede Care
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Written by Mike
Mike is the founder of Beastly Facts and a lifelong reptile enthusiast. He shares his home with Dex, a bearded dragon with strong opinions about crickets and basking schedules. Mike writes in-depth care guides, animal facts, and the occasional short story about life with exotic pets.
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