autoestimularse

A clinical/technical term used in psychology and medicine (e.g., describing stimming behaviors, or biofeedback devices). Register depends heavily on context, so it's worth learning as a technical term rather than casual vocabulary.

• Algunos niños con autismo se autoestimulan para regular la ansiedad. — Some children with autism self-stimulate to regulate anxiety.
• El dispositivo permite al paciente autoestimularse bajo supervisión médica. — The device lets the patient self-stimulate under medical supervision.
• El informe clínico describe cómo el paciente tendía a autoestimularse repetitivamente. — The clinical report describes how the patient tended to self-stimulate repetitively.

This is a clinical term — a learner should be aware of the register before reaching for it outside medical or psychological contexts.