What Causes Muscle Spasms In Left Chest Area?
Anxiety is the most probable cause.
Detailed Answer:
I read the description of those symptoms carefully. I understand that you must be scared of the possibility of a heart condition.
I do not think that is the case though that description doesn't look typical for a heart issue at all, the fact that the symptoms are exacerbated by the touch confirms that as cardiac discomfort wouldn't be affected by superficial touch or pressure. Of course if the ides is really bothering you you could get checked by your doctor with EKG and some routine blood tests to exclude other possible causes (blood count, glucose, electrolytes, thyroid function).
In my opinion those symptoms are benign and related to anxiety. If they persist despite relaxation techniques then perhaps treatment with anti anxiety medication might be indicated. I don't know what tests have you had for the cause of the anxiety disorder and what medication have you tried if any.
Generally for short term treatment the chosen medication are benzodiazepines, while when it comes to long term treatment antidepressants are more suitable as they are equally effective against anxiety without the tolerance and dependance issues of the benzodiazepines.
I remain at your disposal for further questions.
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Detailed Answer:
I noticed only now that your question was directly to me, I had thought it was a general question for a neurologist, thank you for your confidence.
Yes, a palpitations or arrhythmia can be the cause,so it's recommended an EKG and blood count, electrolytes and thyroid function as probable causes of arrhythmia (and anxiety too).
Some tachycardia and palpitations might be expected in the setting of anxiety as well, the aim is to exclude arrhythmia related to abnormal heart triggering pathways.
As I said it's unlikely and your past history makes anxiety the probable cause, but it's better to be safe than sorry and do these simple tests.
I am confident everything will work out for the best.