How to Say "nit" in Spanish
The Spanish word for “nit” is “piojo” — A2 level.
English → SpanishA2
nounA2
loosely used to refer to the pest in general

Examples
Mi hijo tiene un piojo en el pelo.
My son has a louse in his hair.
Hay un brote de piojos en la escuela primaria.
There is a lice outbreak at the elementary school.
Necesitas un peine especial para quitar los piojos.
You need a special comb to remove the lice.
Always Masculine
The word 'piojo' is always masculine, even if you are talking about a female insect. You don't say 'pioja'.
Singular vs. Plural
Just like in English, we usually talk about them in the plural ('piojos') because they rarely travel alone!
Confusing the egg with the bug
Mistake: “Llamar 'piojo' al huevo.”
Correction: Use 'liendre' for the egg (nit) and 'piojo' for the actual insect.
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