Took my son to the only Hot Spring Park in Singapore. It is actually free to admit.
When I tried to dip my feet in, it was extremely hot. My son and I had dipped in and out until we tried to get our feet stayed in the water until they got used to the temperature.
It is supposed to have good benefit for health but those with health issue should not try.
Read an article about a guy who had to remove his toe due to medical condition after dipping in the hot spring.
Those with no medical condition, it supposed to have health benefits especially for our sole.
If you are in Singapore, can go for a try since no cost.