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Potassium chrome alum or chrome alum ( potassium chromium sulfate ) is moderately toxic by skin contact causing dermatitis , allergies , and skin ulcers which might take a longtime to heal . Undermining and sinus tracts also may be associated with Stage IV pressure ulcers . Corneal ulcers , and studies in the perioperative setting , were not included . There is ample evidence linking exposure of human skin to HD at levels high enough to cause acute injury , and the development of skin cancer , pigmentation disorders and skin ulcers . Ulcers tend to be solitary and well circumscribed and usually are 0.5-2.5 cm in diameter.Most gastric ulcers tend to occur at the junction of the fundus and antrum , along the lesser curvature.Benign ulcers tend to have a smooth , regular , rounded edge with a flat smooth base and surrounding mucosa that shows radiating folds.Malignant ulcers usually have irregular heaped-up or overhanging margins . While improvements only occurred in certain areas of nursing home care , and actually declined somewhat overall in preventing bedsores , the " QIOs " were credited with lowering the bedsore rate in facilities in which they were able to work intensively with facility staff.HHS Secretary Tommy G. Thompson said that since the start of the Nursing Home Quality Initiative two years ago , use of physical restraints has dropped 23 percent and the proportion of nursing home residents in chronic pain has fallen 38 percent.HHS said that nationwide , the percentage of patients with bedsores , known as " pressure ulcers , " rose from 8.5 percent to 8.7 percent . These patients have many of the risk factors for the development of pressure ulcers including reduced mobility / activity , medications , neurologic deficits , increasing age , incontinence , decreased mental status , poor nutrition , pressure , shear forces , and friction . North pole magnetized water has a healing effect on skin ulcers such as bed sores . " ) The tissue generated then serves as a temporary covering for burn patients or sometimes as a permanent graft for treatment of skin ulcers . Different strategies have been advocated for the prevention of pressure ulcers , and the Agency for Healthcare Research and Quality ( AHRQ ) has identified the use of pressure relief bedding as a means to prevent the development of pressure ulcers during hospitalization . Pressure ulcers are known to be costly for the health care system and delay recovery in many patients . This condition had been diagnosed according to standard National Institute of Diabetes and Digestive and Kidney Diseases ( NIDDKD ) criteria and confirmed by the presence of severe glomerulations or Hunner ulcers on the bladder wall after hydrodistension .