Si tens picor al coll, has de beure aigua i descansar.

Si means if.

So Si tens picor al coll... means If you have an itchy throat / If your throat itches...

A useful thing to remember is that Catalan si without an accent means if, while sí with an accent means yes.

Tens is the 2nd person singular form of the verb tenir, which means to have.

• tenir = to have
• tens = you have

So:

• Si tens picor... = If you have itching...

Catalan often leaves out the subject pronoun, so tens by itself already means you have. You could say si tu tens, but tu is usually unnecessary unless you want emphasis.

Picor is a noun meaning itching, itchiness, or sometimes irritation that makes you want to scratch.

In this sentence, picor al coll means something like:

• itchiness in the throat
• an itchy throat
• throat irritation

Catalan often uses a noun like picor where English might prefer an adjective like itchy.

Al is a contraction of a + el.

• a = to / at / in
• el = the
• al = to the / in the

So:

• picor al coll literally = itching in the throat / at the neck

In natural English, we would usually translate it as an itchy throat or itching in the throat.

This kind of contraction is very common in Catalan:

• a + el = al
• de + el = del

Literally, coll often means neck, but in health-related expressions it can correspond to throat depending on context.

So in this sentence, picor al coll is understood as itchiness in the throat/neck area, and the natural English meaning is usually an itchy throat.

A related and very common expression is:

• mal de coll = sore throat

So even though coll literally looks like neck, the translation may be throat in the right context.

Has de comes from the structure haver de + infinitive, which expresses obligation, necessity, or what one should do.

• has de beure = you have to drink
• has de descansar = you have to rest

In this sentence, has de is like:

• you have to
• you should
• you need to

The exact English translation depends on tone and context, but the basic idea is recommendation or obligation.

Because Catalan normally expresses have to with haver de + infinitive, not with tenir.

So:

• has de beure = you have to drink
• not normally tens de beure

This is different from English, where have to uses the verb have. In Catalan, the standard structure is based on haver.

Very common forms are:

• he de = I have to
• has de = you have to
• ha de = he/she has to
• hem de = we have to
• heu de = you all have to
• han de = they have to

After haver de, Catalan uses the infinitive form of the verb.

So:

• has de beure = you have to drink
• has de descansar = you have to rest

Here:

• beure = to drink
• descansar = to rest

This is similar to English have to + verb.

Catalan often omits subject pronouns because the verb ending already shows who the subject is.

In this sentence:

• tens already tells you it means you have
• has de already tells you it means you have to

So Catalan does not need to repeat tu.

You could say:

• Si tu tens picor al coll, tu has de beure aigua i descansar

but that sounds more emphatic than neutral. The version without tu is more natural in most cases.

Catalan often uses a noun directly without adding a word equivalent to some.

So:

• beure aigua = drink water

English can say drink water or drink some water. Catalan does not need an extra word here.

Also, aigua means water, and it is a very common feminine noun:

• l’aigua = the water

You may notice that even though aigua is feminine, it often takes l’ because it begins with a vowel.

I means and.

So:

• beure aigua i descansar = drink water and rest

It simply joins the two actions.

A pronunciation note: Catalan i is pronounced like ee.

Not exactly an imperative form, but it gives advice or instruction.

Literally, the structure is:

• If you have an itchy throat, you have to drink water and rest.

So it sounds like:

• advice
• a recommendation
• a statement of what should be done

If Catalan wanted a more direct command, it could use the imperative, for example:

• Beu aigua i descansa. = Drink water and rest.

But has de... is softer and more explanatory.

This is a very normal if-clause + main clause structure.

• Si tens picor al coll = condition
• has de beure aigua i descansar = result / advice

Catalan word order here works much like English:

• If you have throat irritation, you should drink water and rest.

You could also sometimes reverse the order in other contexts, but this order is the most straightforward and natural.

Yes. Catalan often allows several natural ways to express similar advice. For example:

• Si tens picor al coll, has de beure aigua i descansar.
• Si et pica el coll, has de beure aigua i descansar.
• Si tens mal de coll, has de beure aigua i descansar. (this changes the meaning slightly to sore throat)

These are not all identical:

• picor = itchiness/irritation
• et pica el coll = your throat/neck itches
• mal de coll = sore throat

So the original sentence specifically focuses on itchiness or irritation rather than pain.