Kalau ruam di tangan saya belum hilang, saya akan kembali ke klinik besok pagi.

Kalau means if in this sentence.

So:

• Kalau ruam di tangan saya belum hilang = If the rash on my hand hasn’t gone away yet

A few useful notes:

• kalau is very common in everyday Indonesian
• A more formal alternative is jika
• In conversation, kalau can also sometimes feel close to when depending on context, but here if is the best translation

Di tangan saya means on my hand or in/on my hands, depending on context.

Breakdown:

• di = in / on / at
• tangan = hand
• saya = my / I

In Indonesian, possession often works like this:

• tangan saya = my hand
• literally: hand my

So ruam di tangan saya means the rash on my hand.

In Indonesian, possessive pronouns usually come after the noun.

Examples:

• rumah saya = my house
• dokter saya = my doctor
• tangan saya = my hand

So tangan saya is the normal Indonesian word order, not saya tangan.

Belum hilang means has not disappeared yet or hasn’t gone away yet.

This is an important difference:

• belum = not yet
• tidak = not

So:

• belum hilang = it is still there now, but it may disappear later
• tidak hilang = it does not disappear / it didn’t disappear

In this sentence, belum is used because the speaker is talking about a condition that may still improve later.

Here, hilang means to disappear or to go away.

Although hilang can also mean lost in other contexts, here it refers to a symptom.

Examples:

• Rasa sakitnya hilang. = The pain went away.
• Ruamnya belum hilang. = The rash hasn’t gone away yet.

So in health-related contexts, hilang is a very natural word.

Akan marks the future.

• saya akan kembali ke klinik = I will return to the clinic

It is similar to will in English.

However, Indonesian often omits akan if the future meaning is already clear from a time expression like besok pagi (tomorrow morning).

So both are possible:

• Saya akan kembali ke klinik besok pagi.
• Saya kembali ke klinik besok pagi.

The version with akan makes the future meaning more explicit.

Both can work, but they are slightly different.

• kembali ke klinik = return to the clinic
• pergi ke klinik lagi = go to the clinic again

Kembali emphasizes returning to a place you have already been to.
Since the speaker is going back to the clinic, kembali is a very natural choice.

So:

• Saya akan kembali ke klinik sounds a bit more like I’ll go back to the clinic
• Saya akan pergi ke klinik lagi sounds more like I’ll go to the clinic again

Both are understandable, but kembali fits especially well here.

Because they show different kinds of location:

• di = at / in / on → location
• ke = to → direction

So:

• di tangan saya = on my hand
• ke klinik = to the clinic

This is a very important Indonesian distinction:

• Saya di klinik. = I am at the clinic.
• Saya ke klinik. = I am going to the clinic.

Because the sentence has two clauses, and each clause has its own subject:

1. Kalau ruam di tangan saya belum hilang
2. saya akan kembali ke klinik besok pagi

The first saya is part of tangan saya = my hand.
The second saya is the subject I.

Indonesian often repeats words that English might leave implied, especially when it helps keep the sentence clear.

Yes, very often.

Since besok pagi already means tomorrow morning, the future is clear. So in natural Indonesian, many speakers would say:

• Kalau ruam di tangan saya belum hilang, saya kembali ke klinik besok pagi.

That said:

• akan makes the future more explicit
• using akan is still completely natural and correct

So the sentence with akan sounds clear and standard.

Besok pagi means tomorrow morning, and Indonesian time expressions are fairly flexible.

The original sentence:

• Saya akan kembali ke klinik besok pagi.

You could also hear:

• Besok pagi, saya akan kembali ke klinik.
• Saya besok pagi akan kembali ke klinik.

The original version is very natural.
Putting besok pagi at the beginning gives it a little more emphasis.

By itself, tangan saya can be understood as my hand or my hands, depending on context.

Indonesian nouns usually do not have a special plural form the way English does. If the speaker wants to be very clear, they could say:

• di kedua tangan saya = on both my hands
• di tangan kiri saya = on my left hand
• di tangan kanan saya = on my right hand

In this sentence, di tangan saya most naturally suggests on my hand, but the exact number is not strongly marked.

Yes, depending on the exact medical meaning.

• ruam = rash
• gatal = itch / itchy
• bintik-bintik = spots
• iritasi = irritation

But if the meaning is specifically rash, then ruam is the best match.

It is a useful medical word, though it may sound a bit more formal or clinical than some everyday symptom words.

Yes, it is natural and correct.

It sounds like a clear, standard sentence you might say in a medical context. A few natural variations are also possible, such as:

• Kalau ruam di tangan saya belum hilang, saya akan ke klinik lagi besok pagi.
• Kalau ruam di tangan saya belum hilang, saya akan kembali ke klinik besok.

But the original sentence is perfectly good Indonesian.