Understanding the Life Cycle of Head Lice: A Closer Look
Dealing with head lice can be frustrating—but understanding their life cycle is key to effective prevention and treatment. Here’s a clear breakdown of how Pediculus humanus capitis (aka head lice) grow, reproduce, and, ultimately, expire.
Stage 1: Eggs (Nits) – Day 0
- Female lice lay eggs (nits) on hair shafts near the scalp.
- These tiny, oval eggs are cemented in place and difficult to remove.
- They hatch in approximately 6–7 days.
Stage 2: Hatching & Moulting – Days 6–12
- Day 6–7: Lice emerge from nits as immature nymphs.
- Day 8–9: First moult occurs as they grow.
- Day 11–12: Second moult advances them to the next nymph stage.
Stage 3: Adulthood – Days 16–17
- After the third moult, lice reach adult form.
- Female lice are slightly larger than males and ready to reproduce.
Stage 4: Reproduction & Egg Laying – Days 17–32
- Within 1–2 days post-mating, females begin laying new eggs.
- Females lay 3–8 eggs daily for about 16 days—multiplying the infestation rapidly.
Stage 5: End of Life – Days 32–35
- Adult lice typically die after about a month of life.
- However, ongoing egg-laying means the cycle continues unless interrupted.
💡 Why This Matters
Knowing the timeline helps pinpoint the best moments to break the cycle—whether by visiting our lice treatment centers, using our non-toxic lice treatment products, or following up with a lice expert. Catching lice in their early nymph stages can prevent a full-blown infestation.
