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"Duele" is a form of "doler", an intransitive verb which is often translated as "to hurt". "Estoy resfriado" is a phrase which is often translated as "I have a cold". Learn more about the difference between "estoy resfriado" and "duele" below.
estoy resfriado()
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
doler()
An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
dolerse
A pronominal verb always uses a reflexive pronoun. (e.g., Te ves cansado.).
