Na ruci mi se pojavio osip, pa mi je doktorica preporučila novu kremu.

Because na can take different cases depending on meaning:

• na + locative = location, on / at
• na + accusative = movement onto something

Here the meaning is location, so we use the locative: na ruci = on the arm / on my arm.

The base noun is ruka (arm/hand), and its locative singular form is ruci.

That mi is the unstressed dative form of ja (to me), but in sentences like this it often expresses possession.

So na ruci mi literally looks like on the arm to me, but in natural English it means on my arm.

This is very common in Croatian with:

• body parts
• clothing
• things closely connected to a person

So Croatian often says something closer to my arm hurt me structure-wise, rather than always using a possessive adjective like moja.

It can, but na ruci mi sounds more natural and idiomatic in this kind of sentence.

Compare:

• na ruci mi = neutral, natural, everyday way to say on my arm
• na mojoj ruci = more explicit, often a bit more emphatic, as if contrasting with someone else’s arm

So na mojoj ruci se pojavio osip is grammatical, but the original sentence is more typical.

The verb is pojaviti se, which means to appear, to show up, to come out.

Here se is part of the verb itself. It does not literally mean itself in this sentence. Many Croatian verbs are learned together with se as part of their normal form.

So you should think of:

• pojaviti se = to appear

not as:

• pojaviti
  • separate meaning se

Because Croatian past tense agrees with the subject in gender and number.

In the first clause, the subject is osip (rash), which is masculine singular, so we get:

• pojavio se

In the second clause, the subject is doktorica (female doctor), which is feminine singular, so we get:

• je preporučila

So the endings show agreement with the subject:

• masculine singular: -o
• feminine singular: -la

Because mi, se, and je are all clitics: short, unstressed words that usually go near the beginning of a clause.

Croatian commonly puts clitics in second position (very early in the clause), so:

• Na ruci mi se pojavio osip
• pa mi je doktorica preporučila...

This is why you do not get a more English-like order such as Na ruci osip se pojavio meni in neutral speech.

So this early placement is a very normal Croatian word-order pattern.

Croatian word order is more flexible than English word order.

In this sentence, putting osip after the verb sounds natural and lets the sentence flow well after the clitics:

• Na ruci mi se pojavio osip

You could also say:

• Osip mi se pojavio na ruci

That is also grammatical, but it shifts the focus slightly. Croatian often moves words around to highlight different parts of the sentence.

Because novu kremu is the direct object of preporučila (recommended), so it goes in the accusative case.

The noun is:

• krema = nominative
• kremu = accusative singular

The adjective must match the noun in gender, number, and case:

• nova krema = nominative
• novu kremu = accusative

So:

• preporučila novu kremu = recommended a new cream

Here pa means something like:

• so
• and so
• then

It connects the two parts of the sentence and shows a result or consequence:

• rash appeared
• so the doctor recommended a new cream

It is very common in everyday Croatian and often sounds natural and conversational.

Doktorica means female doctor.

Croatian often uses separate masculine and feminine forms for professions:

• doktor = male doctor
• doktorica = female doctor

So the sentence tells you the doctor was a woman, and that is also why the verb is preporučila rather than preporučio.

Yes. Croatian allows several word orders, as long as the case endings and clitics are correct.

For example, you could also hear:

• Osip mi se pojavio na ruci, pa mi je doktorica preporučila novu kremu.
• Na mojoj ruci se pojavio osip, pa mi je doktorica preporučila novu kremu.

These are grammatical, but the original version sounds very natural and idiomatic. In Croatian, different word orders often change focus or style, not the basic meaning.