Brief Answer:
may be due to vascular problem. Needs evaluation

Detailed Answer:
Hi, Thanks for using XXXXXXX
I went through the query and understand your concern.

1. Keeping in mind your medical history of chronic ischemic heart disease, the flushing and numbness may be due to vascular problem. You need to get checked for pulse and BP in both hands and may require angiography / Doppler to confirm the vascular compromise.

This may occur due to thrombosis in blood vessels or due to any vascular obstruction (usually unilateral). The flushing may be due to increased local blood supply or decreased drainage and the numbness is due to variation in nutrients/oxygen supply to tissue/nerves.

2. If it is bilateral the problem may be due to some cardiac problem or generalized vascular problem. So I advice you to get examined by your doctor once and may require above said investigations with ECG, echo cardiogram and lipid profile to diagnose if any problem.

For now continue drugs you are taking for ischemic heart disease and have routine follow up with your doctor. Based on examination further management can be decided.

I hope this information has been both informative and helpful for you. Feel free to ask if any related query and I will be glad to answer them.
If you like my answers kindly rate it, and write a review as well.
Wish you a very happy life and good health.

Regards,

---