Many thanks for your detailed answer. Given that I have an ongoing stomach acid problem, I am hoping it is related to that and nothing more serious. My gp is now organising an abdominal CT scan to confirm/eliminate more serious possibilities.
Thanks again for your time.
Hi
Welcome to the MedHelp forum!
If you are involved in any job or work that uses your neck and strains it a lot like a computer job or fine machinery work etc, then the localized muscle cramps could be due to muscle strain. Good neck exercises to relieve muscle strain will help. It can also be due to a pinched cervical spinal nerve. Hence if neck exercises and warm heat pad does not help, then you need to consult a neurologist.
Other possibilities that should be looked into are heart problems, gall bladder issues, liver dysfunction, pancreatic problems and duodenal ulcer. Since you have reflux, it can also be hiatal hernia, Crohn’s, celiac, any food intolerance or IBS. Consult a gastroenterologist (a specialist who looks after the diseases of our digestive system) for further investigations (apart from endoscoy) to rule out these issues including liver, gallbladder and pancreatic function. It is difficult to comment beyond this at this stage. Take care!