Δεν είναι φυσιολογικό να πονάς τόσο πολύ· καλύτερα να μιλήσεις με γιατρό.

Because this is an impersonal expression: Δεν είναι φυσιολογικό να... means It is not normal to... or It isn’t normal that...

The adjective is neuter singular because Greek often uses the neuter singular in general statements like this, where there is no specific masculine or feminine noun being described. You can think of it as matching an unstated it.

Να introduces a dependent verb form, usually called the subjunctive in Greek grammar.

English often uses an infinitive in places like this, but Modern Greek does not really have an infinitive, so it uses να + verb instead.

So:

• να πονάς = to be hurting / that you be hurting
• να μιλήσεις = to speak / that you speak

It appears twice because there are two separate verb phrases:

• it is not normal to be hurting so much
• it’s better to speak with a doctor

Greek often leaves out subject pronouns because the verb ending already shows the person.

Here:

• πονάς = you hurt / you are hurting
• μιλήσεις = you speak / you should speak

Both forms are second person singular, so you is already built into the verb. You could add εσύ for emphasis, but normally it is omitted.

It comes from the verb πονάω / πονώ, meaning to hurt or to be in pain.

In να πονάς, the form is the present subjunctive pattern, and it suggests an ongoing situation: to be hurting, to keep hurting, to hurt like this.

That fits the meaning well, because the sentence is talking about continuing pain, not just one brief moment of pain.

Not really. τόσο and πολύ work together naturally.

• τόσο = so / that much
• πολύ = much / a lot

Together, τόσο πολύ means so much, so badly, or so intensely. It is a very common way to intensify what is being said.

So να πονάς τόσο πολύ is stronger than just να πονάς πολύ.

Because καλύτερα here works adverbially and forms a fixed advice expression: καλύτερα να...

This pattern means something like:

• it would be better to...
• you’d better...

So καλύτερα να μιλήσεις means you’d better speak or it would be better for you to speak.

It is very common in spoken and written Greek.

Because μιλήσεις is the aorist subjunctive form, and here it refers to one complete action: to have a talk / to speak once.

Compare:

• να μιλήσεις = speak, have a conversation, make the step of speaking
• να μιλάς = be speaking, speak habitually, keep talking

In this sentence, the idea is not talk to doctors regularly, but have a talk with a doctor, so να μιλήσεις is the natural choice.

The sentence gives general advice, so με γιατρό is understood as with a doctor in a general sense.

That said, many learners will hear or see με έναν γιατρό very often too, and in everyday speech that can sound more natural or more explicit:

• μιλήσεις με γιατρό = speak with a doctor, generic
• μιλήσεις με έναν γιατρό = speak with a doctor, more explicitly a doctor

So the version in your sentence is understandable and concise, but με έναν γιατρό is also very common.

Because the verb μιλάω / μιλώ normally takes με for the person you speak with:

• μιλάω με τον φίλο μου = I speak with my friend
• μίλησε με γιατρό = speak with a doctor

If the sentence used a different verb, the preposition might change. For example:

• πήγαινε σε γιατρό = go to a doctor

So here με is used because the action is speaking with someone.

That mark is the Greek άνω τελεία, often called the upper dot.

It works somewhat like a semicolon or a strong colon in English. It separates two closely related parts of the sentence:

• Δεν είναι φυσιολογικό να πονάς τόσο πολύ
• καλύτερα να μιλήσεις με γιατρό

Important: it is not the Greek question mark. In Greek, the question mark looks like ;.

It is addressed to one person informally, because of the second person singular forms:

• πονάς
• μιλήσεις

If you were speaking formally to one person, or to more than one person, you would use the plural forms:

Δεν είναι φυσιολογικό να πονάτε τόσο πολύ· καλύτερα να μιλήσετε με γιατρό.

No. In everyday Greek, φυσιολογικός / φυσιολογικό very often means normal.

Because it looks like the English word physiological, it can mislead English speakers. In medical or technical contexts it can have a more scientific sense, but in this sentence it simply means normal.

So Δεν είναι φυσιολογικό means It isn’t normal, not It isn’t physiological.

Not exactly. It is advice, and it usually sounds less direct than a straight command.

Compare:

• Μίλησε με γιατρό. = Speak to a doctor. very direct
• Καλύτερα να μιλήσεις με γιατρό. = You’d better speak to a doctor. softer advice

So the sentence sounds concerned and advisory rather than bossy.