אם יש לך כאב ראש, תשתי מים ותנוחי קצת.

That is exactly how Hebrew usually expresses possession.

• יש = there is / there are
• לך = to you (addressing one female or one male; the form is the same here)

So:

• יש לך כאב ראש = literally there is to you a headache
• Natural English: you have a headache

This is the normal Hebrew pattern for to have:

• יש לי זמן = I have time
• יש לנו שאלה = we have a question

The negative version is אין:

• אין לי זמן = I don’t have time

Hebrew often uses a construct phrase for combinations like this, where two nouns are linked directly.

• כאב = pain
• ראש = head
• כאב ראש = headache / literally head-pain

This is more natural than using של here.

Compare:

• כאב בטן = stomachache
• בית ספר = school, literally house of book
• כוס מים = a glass of water

So כאב ראש is just the normal Hebrew way to say headache.

It is addressed to one female.

You can tell from the verb endings:

• תשתי
• תנוחי

The -י ending here marks second person feminine singular.

So the speaker is talking to one woman / one girl.

Other versions would be:

• to one male: אם יש לך כאב ראש, תשתה מים ותנוח קצת.
• to more than one person, masculine/mixed: אם יש לכם כאב ראש, תשתו מים ותנוחו קצת.
• to more than one person, feminine: אם יש לכן כאב ראש, תשתינה מים ותנוחנה קצת in very formal grammar, but in real modern speech people usually avoid these old-style forms and use more common alternatives.

Excellent question. In modern Hebrew, future forms are very often used to give instructions, advice, requests, or commands, especially in everyday speech.

So:

• תשתי מים = drink water
• תנוחי קצת = rest a bit

Grammatically, these are future forms, but functionally they can sound like instructions or advice.

Hebrew also has true imperative forms:

• שתי מים
• נוחי קצת

But in everyday Israeli Hebrew, the future forms are extremely common and often sound more natural.

So in this sentence:

• תשתי is not really you will drink in the usual future sense
• it is more like drink
• same with תנוחי

Yes. Depending on tone and context, it can sound like:

• drink water and rest a bit
• you should drink water and rest a bit
• try drinking water and resting a bit

Because Hebrew often uses these future forms for advice, the tone is often softer than a hard command.

So this sentence can feel like:

• medical advice
• friendly advice
• a suggestion

not necessarily an order.

מים is the normal Hebrew word for water. It looks plural, and historically it is a plural form, but in modern Hebrew it functions as the regular word for water.

So even though it ends like a plural, it usually translates simply as water, not waters.

Examples:

• אני שותה מים = I drink water
• כוס מים = a glass of water

This is similar to a few other Hebrew words that are plural in form but used like a basic singular mass noun.

Hebrew often leaves words like some unstated when English might include them.

So:

• תשתי מים = literally drink water
  • natural English: drink some water
• תנוחי קצת = rest a little / rest a bit

Hebrew does not need a separate word for some here. The context already makes it clear.

This is very common with mass nouns like:

• מים = water
• קפה = coffee
• תה = tea

For example:

• תשתה קפה = drink some coffee / have coffee

קצת means a little, a bit, or somewhat, depending on context.

In this sentence:

• תנוחי קצת = rest a bit

It softens the instruction and makes it sound natural.

Other examples:

• אני עייפה קצת = I’m a little tired
• חכי קצת = wait a bit
• אני מבין קצת עברית = I understand a little Hebrew

So קצת is a very useful everyday word.

The normal Hebrew way to say if you have a headache is simply:

• אם יש לך כאב ראש

You do not need a separate subject pronoun like את here, because the phrase יש לך already expresses the idea clearly.

Hebrew often omits subject pronouns unless they are needed for emphasis or contrast.

You could say אם לך יש כאב ראש for special emphasis, but that would not be the neutral everyday order.

So the natural unmarked structure is:

• אם = if
• יש לך = you have
• כאב ראש = a headache

A simple pronunciation guide is:

Im yesh lakh ke'ev rosh, tishti mayim ve-tanukhi ktsat.

A few notes:

• אם = im
• יש = yesh
• לך is pronounced lakh when speaking to a female here, with the throaty kh sound
• כאב = ke'ev (two beats: ke-ev)
• ראש = rosh
• תשתי = tish-ti
• מים = ma-yim
• ותנוחי = ve-ta-nu-khi
• קצת = ktsat

The kh sound in לך and תנוחי is like the ch in German Bach or Scottish loch.

Yes. שתי מים is the imperative form, and תשתי מים is the future form used as a command/advice.

So both can mean drink water when speaking to one female:

• שתי מים = imperative
• תשתי מים = future form used as instruction/advice

In modern everyday Hebrew, many speakers prefer the future form for commands, especially in normal conversation. So תשתי מים ותנוחי קצת sounds very natural.

Yes, here ו־ is the prefix meaning and.

So:

• תשתי מים = drink water
• ותנוחי קצת = and rest a bit

Hebrew very often attaches small function words directly to the next word, instead of writing them separately. That includes:

• ו־ = and
• ב־ = in
• ל־ = to / for
• כ־ = like / as
• ה־ = the

So ותנוחי is literally and-rest-you(f.s.) as one written word.

The comma separates the if-clause from the main clause:

• אם יש לך כאב ראש = if you have a headache
• תשתי מים ותנוחי קצת = drink water and rest a bit

So the comma works much like it does in English when an if clause comes first.

It helps show the structure:

1. condition
2. advice/result

Yes. לך in writing can represent both:

• לְךָ = to you masculine singular
• לָךְ = to you feminine singular

In everyday modern Hebrew, vowel marks are usually not written, so both appear as לך.

In this sentence, the later verb forms תשתי and תנוחי show that the person being addressed is female, so here לך should be understood as feminine: לָךְ.

You would change the feminine verb forms to masculine ones:

• אם יש לך כאב ראש, תשתה מים ותנוח קצת.

Changes:

• תשתי → תשתה
• תנוחי → תנוח

Everything else stays the same.

That is because:

• יש לך works for both masculine and feminine in unpointed writing
• כאב ראש, מים, and קצת do not need to change here