Questions & Answers about La médica dice que debo guardar reposo en casa.
Here, la médica means the doctor, referring to a specific person.
Spanish often uses the definite article with professions when talking about a particular person:
- La médica dice... = The doctor says...
- El profesor llega tarde. = The teacher arrives late.
But after ser, professions often appear without an article:
- Es médica. = She is a doctor.
So the article is there because la médica is the subject of the sentence, not because professions always need an article.