I have now for the last few months mostly concentrated on regular Chi Gung exercises, both forms and static positions. Once in a while, maybe once a week, I have been doing some Tridaya breathing for around 20 minutes.

EVERY time I do chi gung, the left palm is getting warm. It is a comfortable warmth, and I feel no negative results or effects from it. Sometimes when not doing chi gung, the palm will also get warm, but it is not that often.

For me it seems like this effect of warmth in the palm is a result of the training. It was the Tridaya training that produced this effect, but it seems like the chi gung training, still keeps the palm warm. I have to mention that the arms or palms are in no way tensed, as I practice relaxation every time I do chi gung. (they are not tensed during Tridaya breathing either).

I believe this "warm palm" effect is a positive side-effect, due to maybe some kind of "opening" of the energy point in the left palm. When I do chi gung and the energy is "awakened", I feel the warmth all over the body, and especially a very "hot spot" in the left palm.
And as I have mentioned before, I have not noticed any negative side-effects from the training. IF the Tridaya exercises are dangerous, I think I should have noticed that by now. I am almost never sick, never headache, no other kinds of physical or mental problems, so my conclusion - a couple of years after doing intensive Tridaya training, is that it is NOT dangerous.