Why do I feel a sudden cold sensation trickling down my scalp?

Why do I feel a sudden cold sensation trickling down my scalp?

1. Introduction A sudden cold or trickling sensation on the scalp is a form of paresthesia, which is an abnormal neurological perception caused by the mild irritation or misfiring of sensory nerves. This sensation is generally benign and is frequently linked to transient anxiety, sudden temperature changes, or cervical muscle tension affecting the cranial nerves. … Read more