Reflexive pronouns are used when the “receiver” of the action is the same person as the “doer”. In other words, if someone does something to himself or herself, the action is expressed using a reflexive pronoun.
Myself is a reflexive pronoun. In the sentence I've cut myself, the words I and myself mean the same thing. Myself refers back to the subject, I.
Singular reflexive pronouns: myself, yourself, himself, herself, itself
Plural reflexive pronouns: ourselves, yourselves, themselves
Compare yourself and yourselves.
Emma, you can dry yourself on this towel. Vicky and Rachel, you can dry yourselves on these towels.