Getting Small Electrical Shocks In Thorax. Stress Related Or Cardiac Problems Related?
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There is no definite clue to suggest heart problem in your description.
The description itself is rather vague.
The location, intensity, duration, precipitating and relieving factors, associated symptoms and so on – are the clues in history to help in the diagnosis.
Heart problem generally presents with pain, breathlessness, palpitation and so on.
However, at age over 50 / and Diabetes for a decade, it is wiser to have a look at the heart.
In diabetes, typical features may be absent / even asymptomatic.
The best option will be to go to ER / get yourself physically examined / and have basic investigations – like ECG and cardiac markers.
There may not be anything / but to ‘see’ is safer than to wait...
Take care
Wishing speedy recovery
God bless
Good luck