Setelah minum teh hangat, perut saya lebih tenang, tetapi punggung saya masih pegal dan badan saya masih lemas.

In Indonesian, the subject is often left out when it is obvious from context. Here, setelah minum teh hangat literally means after drinking warm tea. The person doing the drinking is understood to be the same person as in the main clause: saya.

So the full idea is: After I drank warm tea, ...

You could make it explicit with setelah saya minum teh hangat, but that is often unnecessary.

Indonesian possession usually works as:

noun + possessor

So:

• perut saya = my stomach
• punggung saya = my back
• badan saya = my body

This is different from English, where the possessive comes first.

In Indonesian, adjectives usually come after the noun they describe.

So:

• teh hangat = warm tea
• air dingin = cold water
• rumah besar = big house

That is the normal word order.

Lebih means more.

So lebih tenang means more calm, calmer, or in this context more settled.

Indonesian often does not state the second half of the comparison if it is obvious. So perut saya lebih tenang means: my stomach is calmer than before.

Yes, tenang literally means calm, but it can also be used more broadly for something that feels settled or less disturbed.

So perut saya lebih tenang suggests the stomach feels:

• less upset
• more settled
• calmer than before

A speaker might also say:

• perut saya terasa lebih enak
• perut saya lebih nyaman

But lebih tenang is understandable and natural in the right context.

Indonesian often leaves out words like feel/feels when the meaning is clear.

English often says: My stomach feels calmer.

Indonesian can simply say: Perut saya lebih tenang.

If you want to make the idea of feeling more explicit, you could say: Perut saya terasa lebih tenang.

Here, terasa means something like feels.

They do different jobs:

• tetapi = but
• dan = and

In this sentence:

• tetapi introduces a contrast with the first idea
  (my stomach is better, but...)
• dan connects two remaining symptoms
  (my back still aches and my body still feels weak)

So the structure is: improvement + but + two ongoing problems

Masih means still.

It is repeated because it modifies two separate descriptions:

• punggung saya masih pegal
• badan saya masih lemas

Repeating masih makes both parts clear and balanced. It sounds natural.

In some contexts, Indonesian can avoid repetition, but here the repetition is very normal and helps clarity.

They describe different physical feelings:

• pegal = sore, achy, stiff, especially in muscles or the back
• lemas = weak, limp, lacking energy

So:

• punggung saya masih pegal = my back is still sore/achy
• badan saya masih lemas = my body still feels weak

They are not interchangeable.

These are different body-related words:

• perut = stomach, belly, abdomen
• punggung = back
• badan = body

A useful detail: badan often refers to the body as a whole, especially how your body feels physically. So badan saya masih lemas sounds natural for saying your whole body still feels weak.

Yes, often you can, if the meaning stays clear.

For example, this is also natural: Setelah minum teh hangat, perut saya lebih tenang, tetapi punggung masih pegal dan badan masih lemas.

Because once saya is established, it can be understood in the following phrases.

However, repeating saya can make the sentence clearer or more balanced, especially for emphasis.

Setelah means after and introduces a time clause.

So:

• Setelah minum teh hangat, ... = After drinking warm tea, ...

It sets up the timing before the main statement. This is very common in Indonesian.

A close alternative is sesudah, which also means after:

• Sesudah minum teh hangat, ...

Both are correct, though setelah is extremely common.

Yes. Saya is the more neutral and polite form for I / my.

So:

• perut saya = neutral/polite
• perutku or perut aku = more casual

In conversation with close friends, you might hear: Setelah minum teh hangat, perutku lebih tenang, tapi punggungku masih pegal dan badanku masih lemas.

But the original sentence with saya sounds more standard and generally appropriate.