Questions & Answers about יש לי כאב ראש, ולכן אני רוצה לנוח בבית.
That is exactly how Hebrew often expresses possession.
- יש = there is / there are
- לי = to me (the preposition ל־
- י)
So יש לי כאב ראש literally means There is to me a headache, but in natural English we say I have a headache.
This pattern is very common in Hebrew:
- יש לי ספר = I have a book
- יש לך זמן? = Do you have time?
- אין לי כסף = I don't have money
So when you want to say I have..., Hebrew often uses יש + ל־ rather than a verb meaning to have.