Çocuğun alnı sıcaksa ve yanağı kızarıyorsa biraz dinlenmeli.

Because Turkish is showing possession.

• çocuğun = of the child / the child’s
• The ending -un / -ün / -ın / -in is the genitive ending.

Here, çocuğun alnı literally means the child’s forehead, and çocuğun yanağı means the child’s cheek.

So the structure is:

• çocuğun = possessor
• alnı / yanağı = possessed thing

This is a very common pattern in Turkish:

• adamın arabası = the man’s car
• kadının eli = the woman’s hand
• çocuğun alnı = the child’s forehead

Because they have the 3rd person possessive ending, meaning his/her/its.

• alın = forehead
• alnı = his/her forehead
• yanak = cheek
• yanağı = his/her cheek

In Turkish, when talking about someone’s body parts, you usually mark them as possessed:

• başım = my head
• elin = your hand
• ayağı = his/her foot

So in this sentence, the child’s forehead and cheek are being referred to, which is why Turkish uses:

• çocuğun alnı
• çocuğun yanağı

Also notice the stem changes:

• alın + ı → alnı
• yanak + ı → yanağı

These changes happen because of normal sound patterns in Turkish.

This is due to consonant softening.

Some Turkish words ending in p, ç, t, k change that final consonant when a vowel-initial ending is added.

Here:

• yanak
  • -ı → yanağı

The final k becomes ğ.

Other examples:

• çocuk → çocuğu
• köpek → köpeği
• renk → rengi

So yanağı is the expected possessed form of yanak.

-sa / -se is the conditional ending, often meaning if.

So:

• sıcak = warm / hot
• sıcaksa = if it is warm / if it’s hot

This is a shorter form of:

• sıcak ise

In everyday Turkish, ise often contracts:

• yorgunsa = if he/she is tired
• evdeyse = if he/she is at home
• sıcaksa = if it is warm

So çocuğun alnı sıcaksa means if the child’s forehead is warm.

Because it is based on a verb, while sıcaksa is based on an adjective.

Breakdown:

• kızar- = become red / redden
• -ıyor = present continuous
• -sa = if

So:

• kızarıyorsa = if it is becoming red / if it is reddening

In context, it naturally means something like if the cheek is turning red.

Why not just kızarsa?

• kızarsa = if it turns red / if it becomes red
• kızarıyorsa = if it is turning red / if it’s in that state now

The -ıyor part gives it a more ongoing, current feel.

Because Turkish often expresses if with the ending -sa / -se instead of a separate word.

So English uses:

• if the forehead is warm

Turkish uses:

• alnı sıcaksa

And:

• if the cheek is turning red
• yanağı kızarıyorsa

This is very normal in Turkish. The conditional idea is built directly into the word.

The understood subject is the child.

The sentence does not explicitly say o or repeat çocuk, because Turkish often leaves the subject unstated when it is obvious from context.

So biraz dinlenmeli means:

• he/she should rest a little
• here, clearly referring to the child

This kind of omission is extremely common in Turkish.

A fuller version could be:

• Çocuğun alnı sıcaksa ve yanağı kızarıyorsa çocuk biraz dinlenmeli.

But repeating çocuk would sound less natural unless you wanted extra emphasis.

dinlenmeli expresses necessity, advice, or recommendation.

Breakdown:

• dinlenmek = to rest
• dinlenmeli = should rest / ought to rest / needs to rest

This is formed with -malı / -meli, which often means:

• should
• must
• ought to

Examples:

• Gitmeli. = He/She should go.
• Uyumalı. = He/She should sleep.
• Dinlenmeli. = He/She should rest.

It is usually less direct than an imperative:

• Dinlen! = Rest! → direct command
• Dinlenmeli. = He/She should rest. → advice/necessity

So here it sounds like a recommendation based on symptoms.

biraz means a little / a bit / for a while.

So:

• dinlenmeli = should rest
• biraz dinlenmeli = should rest a little / should get some rest

It softens the statement and makes it sound more natural and practical. Without biraz, the sentence would still be correct, but biraz adds the idea of some rest rather than just the abstract idea of resting.

Because Turkish commonly puts conditions, time clauses, and other background information before the main clause.

So the structure is:

• [If the child’s forehead is warm and the cheek is turning red] [he/she should rest a little].

This is very natural Turkish word order.

Turkish often prefers:

• Eve gelirse ararım. = If he/she comes home, I’ll call.
• Yağmur yağarsa gitmeyiz. = If it rains, we won’t go.
• Çocuğun alnı sıcaksa... dinlenmeli.

You could sometimes rearrange parts for emphasis, but the given order is the most normal.

Yes. ve simply means and, joining two conditional statements.

The sentence has two linked conditions:

• çocuğun alnı sıcaksa = if the child’s forehead is warm
• yanağı kızarıyorsa = and if his/her cheek is turning red

Turkish can repeat the conditional marking on both parts, and that is exactly what happens here.

So the logic is:

• if X and if Y, then Z

In natural English we usually say:

• If X and Y, then Z

But Turkish often marks each predicate clearly.

Not necessarily. kızarmak can mean several related things depending on context:

• to turn red
• to redden
• to blush

In this sentence, because it is talking about a child’s cheek and possible symptoms, the most natural sense is to become red / to redden, not specifically to blush from emotion.

So yanağı kızarıyorsa is best understood as if the cheek is getting red.

Turkish often uses the singular when referring to a body part in a general or observable way.

So yanağı kızarıyorsa can sound perfectly natural even if the speaker is just noticing redness in the cheek area. It does not necessarily mean only one cheek matters in a strict anatomical sense.

If you specifically wanted to say the cheeks, you could say:

• yanakları

But the singular here is completely normal and idiomatic.