I remember when our kids were little and sick their dad would rock them, pat their backs and sing into their ears.
No matter how uncomfortable they were this soothing comfort brought them rest.
People sing for all kinds of reasons, but no singing will bring you more comfort than when your bring a sacrifice of praise to God.
Sing praises to God, sing praises; Sing praises to our King, sing praises. (Psalms 47:6 NASB)
What song are you singing today?