A little crack above the buttock groove of the tailbone, this condition may be caused by the limited neurodermatitis in this area. Because of the site of neurodermatitis, so once this disease occurs, it may cause local proliferation of the stratum corneum as well as epidermal hypertrophy, gradually resulting in local skin dryness, thus forming part of the chaffing, when these chaffing continues to develop, it may form local skin cracking performance. For this situation, the need for timely use of drugs for treatment, if the cracking is more obvious, need to be applied externally to ease the development of cracks Mucopolysaccharide polysulfate cream.