Si vuelve a sangrar, cambiaremos la tirita y limpiaremos todo otra vez.

Because after si meaning if, Spanish normally uses the present indicative for real, possible future conditions.

So:

• Si vuelve a sangrar, cambiaremos... = If it bleeds again, we’ll change...

This is the normal pattern:

• Si + present indicative, future
• Si llueve, nos quedaremos en casa. = If it rains, we’ll stay home.

Using si + future is generally not correct in standard Spanish for this kind of sentence.

Volver a + infinitive means to do something again.

So:

• vuelve a sangrar = bleeds again
• literally: returns to bleed

This is a very common structure in Spanish:

• Volvió a llamar. = He/She called again.
• Voy a volver a intentarlo. = I’m going to try again.

In your sentence, volver a is attached to sangrar.

Yes, absolutely.

• Si vuelve a sangrar...
• Si sangra otra vez...

Both mean basically If it bleeds again...

There is only a small stylistic difference:

• volver a + infinitive is a very common verbal structure for again
• otra vez is an adverbial phrase meaning again / another time

Both are natural. Spanish often uses either option depending on rhythm and style.

Because they refer to different actions.

• Si vuelve a sangrar = If it bleeds again
• limpiaremos todo otra vez = we’ll clean everything again

So the sentence is not repeating the same again twice by mistake. It means:

1. if the bleeding happens again,
2. then we will change the bandage and clean everything again.

Because they describe what we will do if the condition happens.

• cambiaremos = we will change
• limpiaremos = we will clean

This matches English very closely:

• If it bleeds again, we’ll change the bandage and clean everything again.

Spanish often uses the future here, but in everyday speech the present can also appear:

• Si vuelve a sangrar, cambiamos la tirita y limpiamos todo otra vez.

That version is also natural in conversation, especially when talking about a planned response.

Because Spanish usually omits subject pronouns when the verb ending already makes the subject clear.

• cambiaremos already means we will change
• limpiaremos already means we will clean

So nosotros is unnecessary unless you want emphasis or contrast.

For example:

• Nosotros cambiaremos la tirita, no ellos. = We will change the bandage, not them.

Without emphasis, leaving the pronoun out is the normal choice.

Yes. Tirita is a very common word in Spain for an adhesive bandage / sticking plaster / Band-Aid-type bandage.

In other Spanish-speaking countries, different words may be more common, for example:

• curita
• bandita
• apósito in more medical/formal contexts

In Spain, tirita is the everyday word most learners are likely to hear.

It is mostly an everyday, common, informal-neutral word in Spain. It is not especially childish, even though it sounds a bit diminutive.

You can use it naturally in normal conversation:

• Te pongo una tirita. = I’ll put a bandage on you.

In a hospital or very formal medical context, someone might instead use a more technical word such as apósito, depending on exactly what they mean.

Here todo means something like everything / all of it / the whole area, depending on context.

If someone is treating a wound, limpiaremos todo otra vez could mean:

• we’ll clean everything again
• we’ll clean the whole thing again
• we’ll clean the whole area again

Spanish often uses todo in a broad, natural way when the context makes the exact meaning clear.

Because tirita is a feminine noun, so it takes la.

• la tirita
• una tirita

This is not unusual: nouns ending in -a are often feminine, and tirita follows that pattern.

It is the normal punctuation choice when the if-clause comes first:

• Si vuelve a sangrar, cambiaremos la tirita...

When the condition comes before the main clause, Spanish usually writes a comma there, just like English often does.

If you reverse the order, the comma is often omitted:

• Cambiaremos la tirita y limpiaremos todo otra vez si vuelve a sangrar.

Both word orders are correct.

Yes. A very natural alternative is:

• Cambiaremos la tirita y limpiaremos todo otra vez si vuelve a sangrar.

This means the same thing.

The original version puts the condition first:

• Si vuelve a sangrar...

That structure is often used when the speaker wants to frame the situation first before giving the response.

Yes.

• limpiaremos todo otra vez
• limpiaremos todo de nuevo

Both mean we’ll clean everything again.

In many contexts:

• otra vez sounds a bit more everyday and conversational
• de nuevo can sound slightly more neutral or polished

But the difference is small, and both are perfectly correct.