Learn these spanish idioms with cabeza (head), brazo (arm) and mano (hand) to sound more like a native speaker.

Spanish idioms with cabeza (head), brazo (arm) and mano (hand)

To be silly, to be an airhead (literally: to be an empty head). 

For example: Mi hermano no sabe de absolutamente nada. Es un cabeza hueca (My brother knows absolutely nothing. He's such an airhead).

To worry too much or to overthink something.

For example: Este problema de matemáticas me trae de cabeza (This maths problem has me wracking my brain).

To stress someone out when telling them something. 
For example: Mi amiga me ha contado tantas veces lo mismo que ya me está calentando demasiado la cabeza con el tema.

To be someone’s right-hand (man).

For example: Mi jefe tiene mucha confianza en Virginia. Ella es su brazo derecho (My boss trusts Virginia a lot. She's his right-hand (man)).

To give up/give in.
For example: Mi padre es muy testarudo. Nunca da su brazo a torcer (My father is very stubborn. He never gives up).

To give someone a hand.
For example: Voy a echar una mano a mi primo con su mudanza (I'm going to give my cousin a hand with his move).

To have something at hand.
For example: He metido el mapa en el primer bolsillo para que esté a mano (I put the map in the first bag so that I have it at hand).

To play another hand (usually for cards).
For example: Se ha hecho muy tarde para jugar otra mano (It's a bit late to play another hand).

To be up to something (in a way that causes suspicion).
For example: Mi hermana siempre tiene malas ideas. Seguro que no se trae nada bueno entre manos (My sister always has bad ideas. I'm sure she's up to no good).