Blødningen stopper.

Because -en is the definite article attached to the noun.

• blødning = bleeding / a bleeding
• blødningen = the bleeding

Norwegian usually puts the definite article at the end of the noun instead of using a separate word like the.

So Blødningen stopper means The bleeding stops / is stopping.

Blødning is usually a feminine noun, but in Bokmål many feminine nouns can also be treated as masculine.

That means you may see:

• ei blødning / blødninga
• en blødning / blødningen

In standard Bokmål, blødningen is completely normal and very common. So even if the noun is historically feminine, the form in your sentence is correct.

Stopper is the present tense of the verb å stoppe.

So:

• å stoppe = to stop
• stopper = stop / stops / is stopping, depending on context

In Norwegian, the present tense often covers what English expresses in several ways:

• The bleeding stops
• The bleeding is stopping
• sometimes even The bleeding will stop, if the context clearly points to the future

Because Norwegian often uses the simple present where English might prefer is + -ing.

So Norwegian says:

• Blødningen stopper

where English might say:

• The bleeding stops
• The bleeding is stopping

Norwegian does have ways to express an ongoing action more explicitly, but in a short sentence like this, the plain present tense is the natural choice.

Yes, it is grammatical and natural, especially in a medical or descriptive context.

It sounds like:

• a doctor or nurse describing what is happening
• a general statement about the bleeding coming to an end

Depending on context, a Norwegian speaker might also say things like:

• Blødningen har stoppet = The bleeding has stopped
• Blødningen stanser = The bleeding is stopping / stops
• Blødningen slutter = The bleeding stops/ends (less typical in some contexts)

But Blødningen stopper is perfectly normal.

Both can mean stops.

• stopper comes from å stoppe
• stanser comes from å stanse

In many situations they are very close in meaning. Å stoppe is often a bit more common in everyday speech, while å stanse can sound slightly more formal or written, though both are widely used.

So:

• Blødningen stopper
• Blødningen stanser

Both can work.

A rough guide for an English speaker is:

BLØD-ning-en

A few pronunciation notes:

• ø is a rounded vowel that does not exist in standard English. It is somewhat like the vowel in French deux or German schön.
• The d in blødning is pronounced, but not strongly.
• The stress is mainly on the first syllable: BLØD.

A very rough approximation might be BLURD-ning-en, but that is only approximate. The ø sound is the part you will want to practice carefully.

It is roughly:

STOP-per

with the stress on the first syllable.

Important detail: Norwegian o in this word is not exactly like English oh. It is usually a shorter, more rounded vowel.

Also, the double pp shows that the vowel before it is short.

Because this is a normal declarative main clause in Norwegian:

• Blødningen = subject
• stopper = verb

Basic Norwegian word order in simple statements is usually:

Subject + Verb + ...

So this sentence follows the standard pattern.

Yes, but the meaning changes.

• Blødningen stopper = The bleeding stops
• En blødning stopper = A bleeding stops

The second sentence is grammatically possible, but it is much less natural in most real situations, because usually you are talking about a specific bleeding, not just any bleeding in general.

So the definite form blødningen is the natural choice here.

Yes. That is very common in Norwegian.

The present tense can express:

• a general truth
• something happening right now
• something scheduled or expected

So Blødningen stopper can mean:

• The bleeding stops
• The bleeding is stopping

Context tells you which one is intended.

Yes, slightly.

• Blødningen stopper = The bleeding is stopping / stops
• Blødningen har stoppet = The bleeding has stopped

So har stoppet places the action as already completed, while stopper describes it as present or in progress.

If you want to say the bleeding is already over, har stoppet is often the better choice.

This sentence normally means the bleeding itself is stopping.

The subject is blødningen (the bleeding), so grammatically the bleeding is the thing that stops.

If you wanted to say that someone stops the bleeding, you would usually need a different structure, for example:

• Legen stopper blødningen = The doctor stops the bleeding

So in your sentence, the bleeding is the subject, not the object.