Si vuelvo a desmayarme, mi madre quiere llevarme directamente a urgencias.

After si meaning if, Spanish normally uses the present indicative to talk about a real future possibility:

• Si vuelvo a desmayarme... = If I faint again...
• Si llega tarde... = If he arrives late...

Spanish does not usually use the future tense after si in this kind of sentence. So si volveré sounds wrong here.

A very useful pattern is:

• Si + present indicative, present / future / imperative

For example:

• Si tengo tiempo, te llamo.
• Si tengo tiempo, te llamaré.
• Si tienes tiempo, llámame.

Volver a + infinitive means to do something again.

So:

• volver a desmayarse = to faint again
• volver a intentarlo = to try again
• volver a llamar = to call again

In your sentence:

• Si vuelvo a desmayarme... = If I faint again...

Here, volver does not mean to return in the literal movement sense. It is part of the expression volver a + infinitive.

Because desmayarse is commonly used as a pronominal/reflexive-style verb in Spanish.

• desmayarse = to faint
• me desmayo = I faint / I pass out

So in the sentence:

• desmayarme literally contains me = myself

Even though English does not say I faint myself, Spanish often uses this pronoun with certain verbs.

This is the full infinitive:

• desmayarse

And when the subject is I, it becomes:

• desmayarme

Other forms:

• desmayarte = for you
• desmayarse = for he/she/you formal
• desmayarnos = for we

Yes. Both are natural and correct.

You can place the pronoun:

• before the conjugated verb: Si me vuelvo a desmayar
• attached to the infinitive: Si vuelvo a desmayarme

This happens in many verb structures with an infinitive.

For example:

• Quiero acostarme / Me quiero acostar
• Voy a levantarme / Me voy a levantar
• Puedo dormirme / Me puedo dormir

So your sentence could also be:

• Si me vuelvo a desmayar, mi madre quiere llevarme directamente a urgencias.

Same meaning.

Llevarme means to take me.

• llevar = to take / to carry
• me = me

So:

• mi madre quiere llevarme... = my mother wants to take me...

As with desmayarme, the pronoun can often go in two places:

• mi madre quiere llevarme
• mi madre me quiere llevar

Both are correct.

Because llevar means to take something/someone away from the current place or toward another destination, while traer means to bring toward the speaker or reference point.

Here the idea is that the mother would take the speaker to the emergency department, so llevar is the natural choice:

• llevarme a urgencias = take me to the ER

If someone at the hospital were speaking, they might use traer in a different context, for example:

• Tráigalo a urgencias = Bring him to the ER

In Spain, urgencias usually refers to the emergency department or ER/A&E.

So:

• ir a urgencias
• llevar a alguien a urgencias

are very common expressions.

A learner might expect an article, like a las urgencias, but in Spain it is very common to say simply:

• a urgencias

This is similar to how some destination nouns are used in fixed expressions without much emphasis on the article.

Depending on context:

• urgencias = the emergency department
• servicio de urgencias = emergency service / emergency department

Because ir a urgencias is a very common set expression in Spain.

Spanish sometimes uses certain place nouns in a slightly institutional or fixed way, especially in everyday speech:

• ir a clase
• ir a misa
• ir a urgencias

So a urgencias sounds very natural.

That said, in some contexts you may also hear forms with an article, especially when speaking more specifically about a particular department or location. But for everyday speech in Spain, llevarme a urgencias is extremely common.

Because quiere here expresses a current wish, intention, or attitude.

• mi madre quiere llevarme... = my mother wants to take me...

It means that this is her present plan or preference if that situation happens again.

If you said querrá, that would usually mean something more like:

• she will want to
• or sometimes a guess: she probably wants to

So quiere is the most straightforward and natural choice.

Directamente is an adverb meaning directly. It modifies llevarme.

• mi madre quiere llevarme directamente a urgencias

This means she wants to take the speaker straight to the emergency department, without delay or without going somewhere else first.

The position is natural because Spanish adverbs are often flexible, but some positions sound more idiomatic than others. Here are a few possible placements:

• Mi madre quiere llevarme directamente a urgencias.
• Mi madre quiere directamente llevarme a urgencias. (possible, but less natural)
• Mi madre quiere llevarme a urgencias directamente. (possible, but the original sounds more natural in many contexts)

So the sentence uses the most natural everyday order.

No. They are related, but not the same.

• desmayarse = to faint / pass out
• marearse = to feel dizzy / nauseous / motion sick

So if someone actually loses consciousness, desmayarse is the right verb.

Examples:

• Me mareé, pero no me desmayé. = I got dizzy, but I didn’t faint.
• Se desmayó en la calle. = He/She fainted in the street.

This is a very useful distinction for learners.

Yes, but it changes the meaning slightly.

• llevarme al hospital = take me to the hospital
• llevarme a urgencias = take me to the emergency department

A urgencias is more specific. It tells you which part of the hospital or medical system she wants to take you to.

If the situation is urgent after fainting, a urgencias is the more precise choice.

Spanish can do either, just like English.

• Si vuelvo a desmayarme, mi madre quiere llevarme directamente a urgencias.
• Mi madre quiere llevarme directamente a urgencias si vuelvo a desmayarme.

Both are correct.

Starting with the if-clause puts the condition first and makes it sound slightly more natural in many contexts, especially when setting up the situation before stating the result.

Also, when the si-clause comes first, Spanish normally uses a comma, as in your sentence.