The night you find lice, and the three weeks that follow

Nine forty on a Tuesday. Kitchen counter, the good flashlight from the garage. Your kid's head is tipped sideways under the light and there, right behind the ear where the hair parts, something the size of a sesame seed moves.

Breathe. Nobody's in trouble. Head lice don't care how clean your house is, they don't jump, they don't fly, and they don't carry disease. They crawl from one head to another when two kids put their heads together over a phone screen, which is roughly what second grade is.

The reason this is a family-section piece and not a health-section piece is that the bug is the easy part. What lice actually test is how your household behaves at 9:40 on a school night when one of you wants to burn the mattress and the other one wants to go to bed.

Assign three jobs in the first ten minutes

Most lice arguments are two people doing the same job badly at the same time. So split it out loud, right there in the kitchen.

Comber. One adult, one kid at a time, under real light. This is the job that ends the problem, and it's the one that gets skipped.

Launderer. Pillowcases, the hoodie, the car seat headrest cover, whatever touched a head in the last couple of days. Hot wash, high dryer. Not the whole house.

Caller. The person who texts the other parents in the morning. More on that in a second, because it's the hardest one and the most important.

Whoever is better at sitting still for forty minutes should comb. Whoever is better at not spiraling should call. If both of you're spiralers, pick by coin flip and don't renegotiate at eleven at night.

And settle one thing now, permanently: you're not going to litigate where it came from. Not the cousins, not the sleepover, not that family. Lice move through classrooms the way yawns do. Blaming a specific household is a great way to lose a friendship over an insect that lives about a day off a human scalp.

The comb is the treatment

Whatever product you use, the combing is what finishes it. Ask your pharmacist or your pediatrician which treatment fits your kid's age and what's actually working in your area, because resistance varies and the answer for a two-year-old isn't the answer for a twelve-year-old. That's their call, not an internet article's.

The mechanical part is yours.

Get a metal nit comb with long, fine teeth. The plastic one taped to the box of whatever you bought is a toy. Soak the hair in cheap conditioner so the comb glides and the bugs can't scramble. Clip the hair into four sections. Comb each section from the scalp out, one narrow pass at a time, and wipe the comb on a white paper towel after every pass so you can see what you pulled.

Then do it again in three days. And again three days after that, for about three weeks. Eggs hatch on their own schedule, and the whole point of the repeat passes is to catch the new hatchlings before they're old enough to lay anything. Families who "treated it" once and got hit again in twelve days didn't get unlucky. They stopped combing.

Check every head in the house the same night, including yours. Treat the heads that have live bugs. Don't dose everybody chemically as a precaution.

What you can skip

You don't need to bag the couch cushions for two weeks. You don't need a pesticide fog, and please don't spray anything meant for a lawn near a child's bed. You don't need to shave your son's head unless he asks for it, in which case, fine, buzz it and move on. Your dog can't get head lice and can't give them to you.

Vacuum the couch and the car seats once. Toss hair ties, brushes and the bike helmet liner in a hot dryer cycle. That's the sweep. The extra six hours of frantic laundry buys you almost nothing except a shorter temper.

The lice-removal salons are real and some of them are good. If you're a single parent, or your wife has four kids with hair to her waist and a full week of work ahead, paying somebody to do three sessions with a metal comb is a defensible use of money. Just know you're buying labor and patience, not magic.

Make the call anyway

Text the parents of whoever your kid sat next to. Tell the teacher. Tell the mom whose house the sleepover was at, even though it's awkward, even though you know she'll tell three people.

Two sentences is the whole script: "Found lice on Emma tonight, treating it. Wanted you to have a heads up so you can check yours." No apology tour. No theory of the origin. Nobody who's raised kids thinks less of you, and the ones who do have simply not been caught yet.

Silence is how a classroom stays infested until March. One family combing alone will lose. Six families combing the same week wins.

Pinworms, and why nobody talks about them

The other common one announces itself around two in the morning, with a kid who can't stop itching and can't explain why. It's extremely common in elementary schools, it's not a sign of a filthy home, and it's not a moral event.

Call the doctor. The usual approach involves treating the household and repeating the dose a couple of weeks later, but the specifics are a prescription question, not a blog question.

Your part is the egg cycle. The eggs are microscopic, they end up under fingernails and on sheets, and they survive on surfaces for a while. So for the next couple of weeks: showers in the morning rather than at night, fingernails cut short, no nail biting, hand washing before every meal like you're prepping for surgery. Wash pajamas and sheets hot. Don't shake the sheets out over the floor, roll them up and carry them.

Say out loud to the kid, once, in a flat voice: "This happens to lots of kids, it's not gross, it's not your fault, we'll fix it." Then stop discussing it. A seven-year-old who decides she's disgusting will hide the next thing from you, and the next thing might matter more.

The rest of the nuisance league

Hand, foot and mouth sweeps preschools and looks alarming and mostly just needs a couch and fluids. Impetigo is the crusty golden patch near the nose that needs a doctor and stops being contagious quickly once it's treated. Ringworm isn't a worm at all, it's a fungus, which is worth knowing before you panic. Pink eye turns up the morning of the class trip, every time. Scabies is its own thing and gets a real appointment, not a home remedy.

Keep a shoebox in the linen closet with the metal comb, a nail clipper, a spare bottle of conditioner and two spare pillowcases. Ten p.m. is a terrible time to learn your nearest open pharmacy is nineteen minutes away.

The kid, by the way, won't remember the bug. She'll remember that you set her up on a kitchen stool with a towel around her shoulders and put on a movie you both like, and that you didn't make a face while you worked. Keep the comb. You'll need it again in about two years.