اذا ظل وجع الركبة، لازم اعمل فحص عند الدكتور.

A common pronunciation would be:

iza ḍall wajaʿ ir-rikbe, lāzem aʿmel faḥṣ ʿind id-doktor.

A few helpful notes:

• إذا is usually pronounced iza
• الركبة becomes ir-rikbe because ر is a sun letter, so the l of الـ assimilates
• الدكتور becomes id-doktor for the same reason
• اعمل is often pronounced aʿmel

You may also hear small regional differences in vowels and in how strongly people pronounce ḍ / ظ.

إذا means if and introduces a condition.

So the sentence has two parts:

• إذا ظل وجع الركبة = the condition
• لازم اعمل فحص عند الدكتور = the result / what should happen if that condition is true

This is very common Arabic sentence structure for if X, then Y.

Yes, it looks like a past form, but after إذا, Arabic often uses a past-looking verb to talk about a future or possible condition.

Here ظل means something like:

• remained
• stayed
• kept on
• continued

So إذا ظل وجع الركبة means if the knee pain continues / if the knee pain persists.

This is a very normal pattern in Arabic, including spoken Levantine.

In everyday Levantine, many speakers write and say ضلّ for to remain / continue.

So you will very often see:

إذا ضل وجع الركبة...

The version with ظل is still understandable and looks a bit closer to more standard spelling. For a learner, the important thing is to recognize that both can refer to the same common verb in Levantine speech.

وجع الركبة is basically an iḍāfa-type structure: pain of the knee.

Breakdown:

• وجع = pain / ache
• الركبة = the knee

Together, it means knee pain or literally the pain of the knee.

This kind of noun+noun structure is very common in Arabic:

• وجع راس = headache
• وجع ضهر = back pain
• وجع معدة = stomach pain

Arabic often uses the with body parts when the owner is already clear from context.

So وجع الركبة can naturally mean pain in the knee even when it is understood to be my knee.

If you want to be more explicit, you could say:

• وجع ركبتي = pain in my knee

Both are possible, but using the knee is very natural in Arabic, especially with body parts and symptoms.

Because after words like لازم (must / need to / should), Levantine usually uses the imperfect verb without the habitual prefix بـ.

So:

• لازم اعمل = I need to do / I should do

But:

• بعمل usually means I do / I am doing / I usually do, depending on context

So لازم بعمل would sound unnatural here.

This is an important Levantine pattern:

• لازم روح = I have to go
• لازم شوفه = I need to see him
• لازم اعمل فحص = I need to do/get a check-up

فحص means an examination, a check-up, or a test, depending on context.

In this sentence, it most likely means a medical examination/check-up.

So اعمل فحص literally means do an examination, but in English we would often say:

• get checked
• have an examination
• get a check-up

This light verb + noun pattern is very common in Arabic:

• اعمل فحص = do/get a test or exam
• اعمل عملية = have/do an operation
• اعمل صورة = get imaging / do a scan or X-ray, depending on context

Because in Levantine, عمل is often used as a very common light verb with nouns.

So اعمل فحص is a natural everyday way to say get an examination.

If you used a simple verb like أفحص, that usually means I examine something myself. That changes the meaning.

So:

• اعمل فحص = get/have an exam
• أفحص = examine something

That is why اعمل فحص works better here.

عند literally means at or with, and it is very commonly used with people, homes, shops, and professionals.

So عند الدكتور means:

• at the doctor’s
• with the doctor

This is very natural in Levantine.

Examples:

• أنا عند الدكتور = I’m at the doctor’s
• عندي موعد عند الدكتور = I have an appointment with the doctor
• رحت عند الدكتور = I went to the doctor

In everyday Levantine, الدكتور is very natural and common.

• الدكتور = doctor
• الطبيب = physician / doctor, but more formal or bookish in many contexts

So in normal speech, عند الدكتور sounds more everyday and conversational.

If you wanted a more formal version, especially in Modern Standard Arabic, you might say:

إذا استمر ألم الركبة، يجب أن أجري فحصًا عند الطبيب.

But for spoken Levantine, الدكتور is the more natural choice.