Common Giant Millipede Health Issues
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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.
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. 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 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.
If you're comparing this species against other exotic pets, see Jackson's Chameleon, Canary, Giant Millipede & Corydoras Catfish compared.
❓ Frequently Asked Questions
What's the most common cause of death in giant millipedes?
Dehydration. Looks shriveled and sluggish, with dry, cracking segments along the body. Insufficient humidity or substrate that isn't holding moisture is behind it, and early on it's manageable: raise humidity, moisten the substrate more deeply, and add a shallow water dish.
What causes a failed or incomplete molt?
Low humidity, poor nutrition, or disturbance while the animal is molting. A failed molt is often fatal. Never assist one or try to pull shed skin off yourself, that can cause real harm. What works is correct humidity beforehand and leaving the millipede completely undisturbed while it molts.
Are mites on a pet millipede dangerous?
Not usually. Many of the mites living alongside a pet millipede are harmless, part of a normal bioactive setup. A heavy infestation is the exception: unusually frequent cleaning behavior, thrashing, or mite clusters visible near the head or legs.
Can you use pesticides or mite sprays on a giant millipede?
No, never. Pesticides and mite sprays are toxic to millipedes and can kill the animal you're trying to help. Gently wipe affected areas with a damp cotton swab instead, if needed.
What causes necrotic lesions or a soft exoskeleton?
Dark lesions mean the substrate is swampy and poorly ventilated, worth correcting immediately. A soft, weak-feeling exoskeleton means calcium deficiency. Add cuttlebone or crushed oyster shell to the enclosure. Chalk isn't an appropriate calcium source for this species.
What's the underlying pattern behind most giant millipede health problems?
Low humidity causes both dehydration and failed molts, which account for most serious problems in this species. Excess wetness combined with poor airflow invites mite overgrowth and necrotic lesions instead. Balanced humidity, more than anything else, is the key to this species' health.
📰 More on the Giant Millipede
📘 Giant Millipede care guide
🪱 How Much Does a Giant Millipede Really Cost? (And a Supply Note Worth Knowing)
🪱 How to Handle a Giant Millipede (Gentle Giant, Brittle Shell)
🪱 Giant Millipede Enclosure Setup
🪲 Giant Millipede Enrichment: The Substrate Is the Food and the Home
🐛 Is It Legal to Own a Giant African Millipede? State-by-State Guide
Written by Michael Ryan
Mike keeps two rescued bearded dragons, Dex and Cera, and writes the care guides on BeastlyFacts from his own research and mistakes. He is not a veterinarian.
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