اذا عندك سعال، حط كمامة قبل ما تفوت عالعيادة.

If you have a cough, put on a mask before you go into the clinic.

Breakdown of اذا عندك سعال، حط كمامة قبل ما تفوت عالعيادة.

• ال: the
• ك: you (suffix)
• عند: at
• على: to

Questions & Answers about اذا عندك سعال، حط كمامة قبل ما تفوت عالعيادة.

Is this sentence fully colloquial Levantine?

It is mostly Levantine, but with a slightly medical/formal flavor.

• حط = Levantine put
• تفوت = Levantine enter/go in
• عالعيادة = very Levantine-style contraction
• سعال = understood in Levantine, but a bit more formal/medical than everyday speech

In everyday conversation, many speakers might say كحّة instead of سعال for cough. But on a clinic sign or instruction, سعال sounds perfectly natural.

What does اذا mean here—if or when?

Here اذا means if, but in practical instructions like this it can feel like if/when.

So the sense is:

• If you have a cough, ...
• or more naturally in context: If / when you have a cough, ...

In Levantine, it is usually pronounced iza.

Why does Arabic say عندك سعال for you have a cough?