Use 'soothe away' when describing the reduction of physical sensations, especially pain or discomfort.

Physical Relief

'Soothe away' implies temporary relief, not a permanent solution.

Temporary Effect

The phrase suggests a gentle or gradual easing of pain or discomfort, not an abrupt change.

Use 'soothe away' to describe calming someone's emotions or fears, not just physical ailments.

It suggests a non-confrontational way of dealing with negative emotions, using softness or kindness.

Often involves an action or presence of someone (or something) providing comfort to another.