The phenomenon you are describing is known as the "ideomotor effect" or "ideomotor phenomenon." It is a psychological phenomenon where merely thinking about or imagining a specific action can cause subtle involuntary muscle movements and sensations related to that action. In simpler terms, when you think about something touching you, your brain can activate the sensory and motor regions associated with that touch, leading to a sensation of being touched even when there is no physical contact.
This effect is a product of the mind-brain connection and is related to how our brain processes thoughts and actions. It's similar to how you might flinch or feel a jolt of surprise when you see someone in a movie getting hit, even though you know it's not real.
The ideomotor effect has been studied in various contexts, including in hypnosis, where suggestions can lead to involuntary movements or sensations. It's also the principle behind tools like Ouija boards, where participants may unconsciously move the planchette in response to their thoughts or expectations.
Overall, the ideomotor effect is a fascinating aspect of human psychology and is related to the complex interplay between our thoughts, emotions, and physical responses. It's a normal and common phenomenon and not a cause for concern. However, if you ever experience unusual or concerning sensations that are not related to the ideomotor effect, it's essential to consult a healthcare professional for proper evaluation and advice.