Hot spring

Hot springs (Japanese:  Hot springs) are a method of healing, first introduced in EarthBound.

In EarthBound
A hot spring can be found in Saturn Valley and Tenda Village, which heals status problems. After an earthquake in the Lost Underworld, two different types of hot springs may erupt out of the ground; a red one or a blue one. The blue ones restore HP, while the red ones cure most status ailments.

In Mother 3
Hot springs are one of two main ways of healing in Mother 3. Hot springs heal HP and PP within a matter of seconds, but aren't as fast as Instant Revitalizing Devices. Hot springs can be found all over the Nowhere Islands. Occasionally, an old man will appear in a hot spring, and ask "Yes?" when spoken to. Much more rarely, a lady appears, who says "Mixed gender bathing?" upon being spoken to.

Memo
"When you're tired from battle, feeling numb, or stricken with poison, nothing beats a dip in a hot spring. Every now and then, your friends who have lost consciousness will suddenly awake to find themselves in a hot spring. Perhaps some kind soul had carried them in? It's better not to ask."

Trivia

 * After eating hallucination-inducing mushrooms on Tanetane Island, if Lucas and company go into the "hot spring" and see the old man, he will take on the appearance of Fassad.
 * In the EarthBound Player's Guide, the red hot spring is erroneously stated to recover HP, where it actually restores status problems; its purpose is stated correctly in a diagram below this error.