Jeg har ondt i ryggen efter arbejdet.

In Danish, at have ondt is a very common fixed expression meaning to be in pain / to hurt.

So:

• Jeg har ondt = I’m in pain / It hurts
• literally: I have pain

This is different from English, where we often say my back hurts. In Danish, it is very natural to say:

• Jeg har ondt i ryggen = My back hurts / I have pain in my back

You can think of ondt here as part of the expression rather than as a normal adjective you translate word-for-word.

Ondt here means painfully / pain / hurting, depending on how it is used in the expression.

In jeg har ondt, it is part of the idiomatic phrase to have pain.

A few useful patterns:

• Jeg har ondt. = I’m in pain.
• Jeg har ondt i ryggen. = I have pain in my back.
• Det gør ondt. = It hurts.

So although ondt is related to bad / painful, the safest way to learn it here is as part of the set phrase have ondt.

Because Danish normally uses the definite form for body parts in expressions like this.

So:

• ryg = back
• ryggen = the back

That is why Danish says:

• Jeg har ondt i ryggen
  literally: I have pain in the back

English usually says my back, but Danish often prefers the back when it is obvious whose body part is meant.

The same pattern appears with other body parts:

• Jeg har ondt i hovedet = I have a headache / My head hurts
• Hun har ondt i benet = Her leg hurts
• Vi har ondt i halsen = Our throats hurt / We have sore throats

Yes, but it is usually less natural in this kind of sentence.

• Jeg har ondt i ryggen = the normal, idiomatic way
• Jeg har ondt i min ryg = understandable, but less natural in everyday Danish

Using min may sound more emphatic, contrastive, or unusually specific, as if you are stressing my back rather than someone else’s.

For everyday speech, i ryggen is the form you should usually choose.

Both can occur in Danish, but they do not always feel exactly the same.

• efter arbejdet = after work / after the workday
• efter arbejde can also mean after work, and is common too

In efter arbejdet, the definite form arbejdet often refers to the work period or workday as a known thing: after work in the sense of after the day’s work / after leaving work.

So this sentence is completely natural. Danish often allows both versions depending on style, region, and exact nuance.

The sentence is:

• Jeg = subject
• har = verb
• ondt i ryggen = complement/expression saying where the pain is
• efter arbejdet = time phrase

So the structure is:

Subject + verb + rest of sentence + time expression

That gives:

Jeg har ondt i ryggen efter arbejdet.

This is normal Danish main-clause word order.

Yes. In Danish main clauses, the finite verb usually stays in second position.

So if you begin with the time phrase, you get:

• Efter arbejdet har jeg ondt i ryggen.

Notice that har comes before jeg.
That is a very important Danish word-order rule.

Compare:

• Jeg har ondt i ryggen efter arbejdet.
• Efter arbejdet har jeg ondt i ryggen.

Both are correct, but the second version emphasizes after work a bit more.

Yes. Har is the present tense of at have.

• jeg har = I have

Even though English might sometimes say My back hurts after work, Danish uses jeg har ondt i ryggen efter arbejdet, which is still present tense.

Depending on context, it can mean:

• My back hurts after work
• I have back pain after work
• I get pain in my back after work

So the present tense here can describe a general situation or a current state.

A rough learner-friendly pronunciation is:

yai har ont i RYG-en EF-ter ar-bai-det

A few notes:

• jeg often sounds closer to yai than to a careful yeg
• ondt is pronounced roughly ont
• ryggen has a soft Danish g, and the first syllable is stressed: RYG-en
• arbejdet is often pronounced more smoothly than it looks in spelling

Danish pronunciation varies a lot in natural speech, so it is best to treat this as only a rough guide and listen to native audio if possible.

Yes, absolutely. That is another very natural Danish sentence.

Compare:

• Jeg har ondt i ryggen efter arbejdet.
• Min ryg gør ondt efter arbejdet.

Both mean roughly the same thing.

The difference is mainly in structure:

• jeg har ondt i ryggen = I have pain in my back
• min ryg gør ondt = my back hurts

Both are common. The version with har ondt i is especially useful because you can easily use it with many body parts.

Usually it describes when it happens: after work.

So the sentence most naturally means:

• I have back pain after work
• My back hurts after work

Depending on context, it may also suggest a cause indirectly, since work may be what leads to the pain. But grammatically, efter arbejdet is primarily a time expression.

Yes. This is a very useful pattern to learn:

Jeg har ondt i + definite body part

Examples:

• Jeg har ondt i hovedet. = My head hurts / I have a headache.
• Jeg har ondt i nakken. = My neck hurts.
• Jeg har ondt i skulderen. = My shoulder hurts.
• Jeg har ondt i maven. = My stomach hurts.
• Jeg har ondt i benet. = My leg hurts.

This is one of the most common ways to talk about physical pain in Danish.

Yes, in this sentence, almost certainly.

Because of i ryggen (in the back), it clearly refers to physical pain.
Without a body part, jeg har ondt still usually means physical pain unless context suggests something emotional.

So here there is no real ambiguity: it means back pain after work.