Can refer to a small bite of food or a wound.
La picada en su brazo resultó ser de una avispa y le causó mucha molestia.
The bite on his arm turned out to be from a wasp and caused him much discomfort.
La picada de la abeja me dejó un hinchazón doloroso en el brazo.
The bee sting left me with a painful swelling on my arm.