La enfermera dice que una herida pequeña puede curarse mejor si la limpias con cuidado.

Because que introduces a reported statement: The nurse says that...

In Spanish, after verbs like decir, pensar, creer, saber, you very often use que before the next clause:

• Dice que viene. = She says that she’s coming.
• Creo que es verdad. = I think that it’s true.

So here:

• La enfermera dice que... = The nurse says that...

English can sometimes drop that, but Spanish normally keeps que.

Una means a, while la means the.

So una herida pequeña means a small wound, not the small wound.

Spanish uses the indefinite article when talking about something in a general or non-specific way. This sentence is making a general statement about small wounds, so una fits well.

Compare:

• Una herida pequeña puede curarse mejor... = A small wound can heal better...
• La herida pequeña puede curarse mejor... = The small wound can heal better...
  This would sound like you are talking about a particular wound already identified.

In Spanish, descriptive adjectives usually come after the noun.

So:

• herida pequeña = small wound
• casa blanca = white house
• libro interesante = interesting book

You can sometimes put an adjective before the noun, but that often changes the tone or emphasis. For a normal, neutral description, una herida pequeña is the most natural order.

This is:

• puede = can / may
• curarse = heal / become healed

So puede curarse means can heal or more literally can heal itself / can become healed.

After a conjugated verb like poder, the next verb stays in the infinitive:

• puede comer = can eat
• puede dormir = can sleep
• puede curarse = can heal

So the structure is very common: poder + infinitive

This is an important distinction.

• curar usually means to heal/cure something or someone
• curarse usually means to heal / to recover / to become healed

Examples:

• El médico cura la herida. = The doctor heals the wound.
• La herida se cura. = The wound heals.

In your sentence, the wound is not healing something else; it is the thing being healed. That is why Spanish uses curarse.

This is very common with body-related or change-of-state verbs:

• La piel se recupera.
• La herida se cierra.
• La infección se cura.

So puede curarse mejor means the wound can heal better.

Mejor is the comparative form of bien and often corresponds to better.

So:

• bien = well
• mejor = better

Examples:

• Lo hizo bien. = He did it well.
• Lo hizo mejor. = He did it better.

In your sentence:

• puede curarse mejor = can heal better

Más mejor is incorrect in standard Spanish, just like more better is incorrect in English.

Also, más bien usually means something different, like rather or more accurately:

• No está enfadado; está más bien cansado. = He isn’t angry; he’s rather tired.

So here, mejor is exactly the right word.

Because after si meaning if, Spanish normally uses the indicative, not the present subjunctive, when talking about a real or possible condition.

So:

• si la limpias con cuidado = if you clean it carefully

This is the normal pattern:

• Si estudias, aprendes.
• Si comes bien, te sientes mejor.
• Si la limpias con cuidado, puede curarse mejor.

The form limpies is subjunctive and would not be used after this kind of si clause.

A helpful rule:

• si + present indicative
• not si + present subjunctive

La is a direct object pronoun meaning it, and it refers back to una herida pequeña.

Since herida is feminine, the pronoun is la:

• la herida → la

So:

• limpias la herida = you clean the wound
• la limpias = you clean it

Spanish often replaces a repeated noun with a pronoun to avoid repetition, just like English does.

In Spanish, object pronouns usually go before a conjugated verb.

So:

• la limpias = you clean it
• lo veo = I see him/it
• te llama = he calls you

That is the normal position with a finite verb.

However, with an infinitive, gerund, or affirmative command, pronouns can attach to the end:

• puede curarse
• está limpiándola
• límpiala

But here limpias is a conjugated verb, so la goes before it: si la limpias

Limpias is the tú form of limpiar in the present tense.

So it means:

• you clean

The sentence is addressing someone informally, as you singular.

Full breakdown:

• yo limpio
• tú limpias
• él/ella limpia
• nosotros limpiamos
• vosotros limpiáis
• ellos limpian

So si la limpias con cuidado means if you clean it carefully.

Yes. If you wanted a formal version, you would change limpias to limpia:

• La enfermera dice que una herida pequeña puede curarse mejor si la limpia con cuidado.

That means if you clean it carefully with usted.

In Spain, both tú and usted are used, but tú is very common in everyday speech. A nurse speaking to a patient might use either one, depending on the level of formality, age, situation, and tone.

Both are possible, but con cuidado is much more common and natural in everyday Spanish.

• con cuidado = carefully
• cuidadosamente = carefully

So these are both grammatical:

• si la limpias con cuidado
• si la limpias cuidadosamente

But con cuidado sounds more conversational and idiomatic.

Spanish often prefers a prepositional phrase where English might use an adverb:

• hablar con calma = speak calmly
• hacerlo con cuidado = do it carefully
• mirar con atención = look carefully / attentively

Yes, depending on context, curarse can mean to heal, to recover, or to get cured.

With herida, the most natural English translation is usually to heal:

• La herida puede curarse mejor = The wound can heal better

With people or illnesses, the translation may shift:

• Se curó de la infección. = He recovered from / was cured of the infection.

So the exact English wording can vary, but the Spanish idea is that the wound improves its healing process.

Sometimes yes, but curarse is the more common and natural choice here.

Both curarse and sanarse can relate to healing, but curarse is especially common for wounds, illnesses, and recovery in general.

For example:

• La herida puede curarse mejor... sounds very natural.
• La herida puede sanarse mejor... is understandable, but less usual.

Learners will hear curarse more often in this medical-type context.

Spanish often uses the present tense for general truths, habitual facts, and advice-like statements.

So:

• La enfermera dice... = The nurse says...
• una herida pequeña puede curarse mejor... = a small wound can heal better...
• si la limpias con cuidado = if you clean it carefully

Even though it is giving advice, the present tense is still the normal choice because the sentence expresses a general principle.

This is similar to English:

• Water boils at 100°C.
• You feel better if you rest.
• A small wound heals better if you clean it carefully.

Yes, but the meaning changes slightly.

Your sentence:

• si la limpias con cuidado = if you clean it carefully

Alternative:

• si se limpia con cuidado = if it is cleaned carefully / if one cleans it carefully

The version with la limpias directly addresses the listener.
The version with se limpia is more impersonal and sounds more like general medical advice.

Both are correct, but they are not identical in tone.

Yes. Herida is a feminine noun:

• la herida
• una herida
• herida pequeña

That is why the article is una and the adjective is pequeña, not pequeño.

Spanish adjectives usually agree in gender and number with the noun:

• una herida pequeña
• dos heridas pequeñas

The sentence is already in a very natural order, but some parts can move for emphasis.

For example, you could say:

• La enfermera dice que si la limpias con cuidado, una herida pequeña puede curarse mejor.

That is still correct. It puts the if clause earlier.

However, the original version sounds very natural and straightforward:

• La enfermera dice que una herida pequeña puede curarse mejor si la limpias con cuidado.

So the order is not completely fixed, but the original is a standard and useful model.