My fingers and toes get the frozen feeling and numb at ambient temperature of 20°c.

I was OK when I was young. It gets worse and worse (temperature tolerant) when I'm more than 25 years old. 28°c is considered cold for me (below 30°c and I need a blanket to sleep). As most indoor places in Malaysia are well air-conditioned, I get uncomfortable in many places. I'm not sure if this is the side effect of my harsh working area temperature of 40-50°c.

Anyone here facing the same problem?

Raynaud's phenomenon?

Last time I tested myself with ice. Finger temperature failed to go back to normal after a specified period.

technically, raynaud's phenomenon has discernible whitening, then blueing (both are hypoxic states) [numbness at this stage] then reddening (restoration of blood flow) [burning sensation said to occur at this stage] of the affected digits (fingers or toes).

however, in actuality, just whitening and numbness is needed for a high suspicion of raynaud's.

if it's not particularly troubling (or does not match the classic raynaud's description) you might ask a normal clinic doctor about it at any time for a more formal examination. the specialist of choice though would be a rheumatologist

It sounds like Raynaud's

I have a mild case of this. The only solution that seemed to work, as per my friend's suggestion of what a TCM person told her, was to consume very small amounts of red wine every couple of days.

It worked. But since I stopped, the issue came back. It's annoying, especially sicne my feet get so cold.