A few months having passed by, the temperature of the water may be gradually lowered until cold is employed, with which it may be either sponged or even plunged into it, every morning during summer. If plunged into cold water, however, it must be kept in but a minute; for at this period, especially, the impression of cold continued for any considerable time depresses the vital energies, and prevents that healthy glow on the surface which usually follows the momentary and brief action of cold, and upon which its usefulness depends. With some children, indeed, there is such extreme delicacy and deficient reaction as to render the cold bath hazardous; no warm glow over the surface takes place when its use inevitably does harm: its effects, therefore, must be carefully watched.
Chemical peel uses a chemical solution to improve and smooth the texture of the facial skin by removing its damaged outer layers. A peel removes several layers of sun damaged skin cells, leaving fresh skin which has a more even surface and colour. It may stimulate new collagen to be formed improving skin texture. Peels may result in superficial, moderate depth or deep skin injury.