yageul meogeodo yeori an naeryeogamyeon dasi geomsareul bada boseyo.

-아/어도 means even if or even though.

So 약을 먹어도 means:

• even if you take medicine
• even though you take medicine

In this sentence, it sets up a contrast:

• 약을 먹어도 = even after taking medicine
• 열이 안 내려가면 = if the fever does not go down

So the idea is: Even if you take medicine, if the fever still doesn’t go down, ...

This is about particles.

• 약을 먹다 = to take medicine
  Here, 약 is the object of 먹다, so it takes 을.

• 열이 내려가다 = the fever goes down
  Here, 열 is the subject of 내려가다, so it takes 이.

A helpful way to think about it:

• You take medicine → medicine is the thing being acted on → object marker
• The fever goes down → fever is what changes state → subject marker

So:

• 약을 먹다
• 열이 내려가다

내려가다 literally means to go down, and Korean commonly uses it for things like:

• fever
• temperature
• numbers
• prices
• swelling

So 열이 내려가다 is the natural Korean expression for:

• the fever goes down
• the fever comes down

It sounds more natural than trying to directly match an English verb like decrease.

Examples:

• 열이 내려갔어요. = The fever went down.
• 체온이 안 내려가요. = The temperature isn’t going down.

Both are grammatical and mean basically the same thing.

• 안 내려가면 = if it doesn’t go down
• 내려가지 않으면 = if it does not go down

The difference is mostly style:

• 안 + verb is more common in everyday speech
• -지 않다 sounds a bit more formal or written

So this sentence uses the more natural conversational form:

• 열이 안 내려가면

-면 means if or when, depending on context.

Here it means if:

• 열이 안 내려가면 = if the fever doesn’t go down

So the sentence structure is:

• 약을 먹어도 = even if you take medicine
• 열이 안 내려가면 = if the fever doesn’t go down
• 다시 검사를 받아 보세요 = please get tested again / please try getting examined again

It is very common to chain clauses like this in Korean.

받다 literally means to receive.

So 검사를 받다 literally means:

• to receive an examination/test

In natural English, we usually say:

• get examined
• have a test
• get tested

Korean often uses 받다 with things that are received from a professional or institution, such as:

• 치료를 받다 = receive treatment / get treatment
• 상담을 받다 = receive counseling
• 검사를 받다 = receive a test/exam

So this is a very standard expression.

In 받아 보세요, the 보다 does not mean to see in the usual sense.

The grammar -아/어 보다 means:

• to try doing something

So:

• 받다 = to receive
• 받아 보다 = to try receiving / to go and get it done

In this sentence, 검사를 받아 보세요 means something like:

• please try getting examined
• please go get tested
• you should get checked

The 보다 softens the suggestion a little. It can sound less direct than a plain command.

Compare:

• 검사를 받으세요. = Get examined.
• 검사를 받아 보세요. = Try getting examined.

Because 보다 here is still treated as a separate auxiliary verb.

So Korean normally writes:

• 먹어 보다
• 가 보다
• 사용해 보다
• 받아 보세요

In everyday writing, you may also see forms written together sometimes, but the standard spacing is to separate them:

• 받아 보세요

So for learners, it is safest to write it with a space.

Yes. 다시 means again.

In this sentence, it suggests:

• the person has already been examined before, or
• they should go back for another check if the fever does not improve

So 다시 검사를 받아 보세요 means:

• please get examined again
• please go for another test/checkup

It does not necessarily mean the exact same test must be repeated; it can also mean go back and get checked again in a medical sense.

It is an instruction, but softer than a blunt command.

-세요 is a polite ending often used for:

• requests
• instructions
• recommendations
• polite commands

So 받아 보세요 can sound like:

• please try getting examined
• you should get examined
• why don’t you get checked again

In a medical context, this sounds like polite advice from a doctor, pharmacist, or caregiver.

Yes:

• 약을 = medicine + object marker
• 먹어도 = even if you take
• 열이 = fever + subject marker
• 안 = not
• 내려가면 = if it goes down
• 다시 = again
• 검사를 = examination/test + object marker
• 받아 보세요 = please try receiving / please go get

Put together:

• 약을 먹어도 = even if you take medicine
• 열이 안 내려가면 = if the fever doesn’t go down
• 다시 검사를 받아 보세요 = please get examined again

A very literal translation would be:

• Even if you take medicine, if the fever does not go down, please try getting examined again.

A more natural English version is:

• If your fever doesn’t go down even after taking medicine, please get checked again.