Millipedes After Rain: Why They Invade

After heavy rain, millipedes sometimes appear in large numbers on walls and floors.

The short answer

Millipedes live in damp soil and leaf litter and move indoors when it is flooded or dry elsewhere. They do not bite and are harmless but can irritate skin and smell if crushed. Sweep or vacuum them, reduce moisture and leaf litter near the house, seal gaps and improve drainage.

Why they come in

• Waterlogged soil.
• Damp leaf litter and mulch.
• Gaps and door thresholds.

Managing

1. Sweep or vacuum and dispose outside.
2. Remove leaf litter near walls.
3. Improve drainage.
4. Seal gaps and fit door sweeps.

Safety

• Their fluid may irritate skin, so wash hands.
• They do not bite.

When to call a professional

If the problem is widespread, keeps returning or you are unsure what you are dealing with, a professional inspection will save time and avoid wasted effort.

Frequently asked questions

Are millipedes harmful?

No.

Do they damage homes?

No.

How long does it last?

A few days to weeks.

Are they the same as centipedes?

No.

This guide is part of IPest's complete resource on household pest control. For identification help, prevention and treatment options, see our full household pest control guide for Bangalore.