Both indicate inflammation. Inflammation may be under the skin or between muscles. Inflammation and edema both reduce skin and muscle elasticity.
Inflammation, blocked nerves, athlete’s foot flare ups produce heat and a burning sensation.
In acupressure, finger pressure will produce heat and a burning sensation. Finger pressure and slapping stimulates blood flow, oxygen flow, and muscle movement. all of these creates energy consumption and the release of heat. Pressure and compression creates heat. Even with inanimate objects, extreme pressure produces heat.