Hello and welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. The medical terms for goosebumps are piloerection. Goosebumps tend to form when you’re cold. They also form when you experience a strong emotional feeling, such as extreme fear, sadness, joy, and sexual arousal. Goosebumps may also occur during times of physical exertion, even for small activities, like when you’re having a bowel movement. This is because the physical exertion activates your sympathetic, or instinctual, nervous system. Sometimes, goosebumps may crop up for no reason at all. Don t worry!In most cases, goosebumps are nothing more than a temporary nuisance. However, goosebumps can be a sign of a medical condition like: -Keratosis pilaris. A harmless and common skin condition that creates the look of goosebumps on the skin for long periods of time. -Autonomic dysreflexia. An overreaction of the nervous system caused by a spinal cord injury. -Temporal lobe epilepsy. A chronic seizure disorder. -Chills. For example, those associated with fevers caused by influenza. YOu have a past neck issue,so, in my opinion there is the root cause of your problem.It can be probably Autonomic disreflexia but this is only a suggestion. I suggest to consult physically a neurologist in your area for the right diagnosis and treatement. Anyway i want to say that you have no reason to be worried. Your full blood panel and hormone panel are normal,so it is evident that you are a healthy person. Hope this information is helpful. Let me know if i can assist you further.