blue, grey, or unusually cold and clammy.
The NHS lists pale, blue, or grey skin as a possible heart attack symptom, noting that color changes may be easier to see on the palms for people with darker skin. Mayo Clinic also explains that poor blood flow in heart failure may cause skin to look blue or grey.
This sign is more concerning when it comes with breathlessness, chest discomfort, confusion, fainting, or extreme weakness.
When to Get Emergency Help
Call emergency services immediately if you or someone near you has
