This is simply holding the arm in water of proper temperature. It is
extremely useful in such painful affections as felons, sprains, and
nearly all injuries of the hand and arm. Ulcers and acute and chronic
skin diseases of the hands and arm are usually benefited by this bath.
If cold water is painful, its application should be preceded by that of
hot water, or alternated with it. Cold hands should be frequently rubbed
in cool water, and alternately immersed for a few minutes each in hot
and cold water. In case of painful felons, the arm must be immersed to
the elbow to relieve the pain, although the disease is only in the
finger.