How to Say "medical condition" in Spanish
The Spanish word for “medical condition” is “afección” — B2 level. This is a very common word in everyday Spanish.

Examples
El médico dice que es una afección leve de la garganta.
The doctor says it is a mild throat condition.
Esta afección cardiaca requiere un tratamiento constante.
This heart condition requires constant treatment.
Las afecciones respiratorias aumentan durante el invierno.
Respiratory ailments increase during the winter.
The '-ción' Rule
In Spanish, almost every word that ends in '-ción' is feminine. You should always use 'la' or 'una' with this word: 'la afección'.
Using 'de' for Specifics
To specify which part of the body is affected, use 'de' plus the body part, like 'afección de los pulmones' (lung condition).
Gender Error
Mistake: “el afección”
Correction: la afección (because words ending in -ción are feminine).
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