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

If it starts bleeding again, we’ll change the bandage and clean everything again.

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

• nosotros: we
• y: and
• limpiar: to clean
• .: period (punctuation mark)

Questions & Answers about Si vuelve a sangrar, cambiaremos la tirita y limpiaremos todo otra vez.

Why is it Si vuelve a sangrar and not Si volverá a sangrar?

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.

What does volver a + infinitive mean here?

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.

Could you also say Si sangra otra vez instead of Si vuelve a sangrar?