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🦷 Head Lice Treatment Simulator

This interactive simulation covers the life cycle of lice and nits on hair, comparing the effectiveness of permethrin, dimeticone, and combing treatments. Users can explore different methods to eliminate infestations and understand their mechanisms of action.

Bruxism, Dental Emergencies & Fungal/Parasitic Skin Infections2DModerate60 FPS

Nits Glued Near the Scalp

Adult lice cement eggs to hair, close to warm skin.

~6: Eggs laid per day (placeholder rate note)
<6mm: Distance from scalp (placeholder warmth note)
High: Glue bond strength (placeholder adhesion note)
~30d: Adult lifespan (placeholder lifespan note)

Why nits stick near the scalp

Warmth near skin speeds incubation of eggs.

Placeholder: proximity to scalp is key.

The cement bond

A protein glue fixes nits firmly to the shaft.

Adult louse anatomy

Six legs with claws grip hair shafts tightly.

Nits Hatch Into Nymphs

After about a week, nymphs emerge from glued eggs.

~8d: Incubation period (placeholder timing note)
~90%: Hatch success rate (placeholder viability note)
~1.5mm: Nymph size (placeholder size note)
Several: Feedings per day (placeholder feeding note)

Hatching mechanics

Nymphs split the egg cap and climb free.

Placeholder: empty shells stay glued to hair.

Nymph behavior

Nymphs feed on blood almost immediately after hatching.

Empty nit shells

Hatched shells look white, easily mistaken for dandruff.

Nymphs Mature Into Adults

Over 1–2 weeks nymphs molt and reach adulthood.

3: Molts to adulthood (placeholder molt note)
9–15d: Maturation time (placeholder duration note)
~50–100: New eggs per cycle (placeholder fecundity note)
~3 weeks: Full cycle length (placeholder cycle note)

Molting stages

Each molt brings nymphs closer to adult size.

Placeholder: the cycle repeats without treatment.

Mating and new eggs

Adults mate quickly, restarting the egg-laying stage.

Population growth

Untreated infestations compound generation after generation.

Treatment Method Comparison

Permethrin, dimethicone, and combing work differently.

~75%: Permethrin efficacy (placeholder resistance note)
~95%: Dimethicone efficacy (placeholder physical note)
~65%: Combing efficacy (placeholder effort note)
Dimethicone: Resistance-proof method (placeholder mechanism note)

Permethrin

Neurotoxic pesticide; resistance is increasingly common.

Placeholder: resistance lowers real-world success.

Dimethicone

Coats and physically suffocates lice; no resistance possible.

Manual combing

Mechanical removal; effective but labor-intensive and repetitive.

Method comparison

Product	Indication	Trial Design	Key Result
Permethrin	Lice + some nits	Neurotoxic paralysis	Fast-acting when susceptible
Dimethicone	Lice + nits	Physical suffocation	No biological resistance
Manual Combing	Visible lice + nits	Mechanical removal	No chemical exposure

Retreatment Window

A second round around day 7–9 catches survivors.

Day 7–9: Retreat window (placeholder timing note)
<100%: Single-tx nit kill (placeholder limitation note)
2: Recommended rounds (placeholder protocol note)
~2 weeks: Full clearance check (placeholder follow-up note)

Why one round is not enough

Nits missed by treatment still hatch later.

Placeholder: retreat before new eggs are laid.

Timing the second treatment

Day 7–9 targets newly hatched nymphs precisely.

Confirming success

Recheck scalp and hair after both rounds complete.

⚙ Under the hood

CanvasBiomedicine

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install