Atopic dermatitis in children: A practical approach. Talk to your doctor before trying an eczema bleach bath. If your skin is cracked or very dry, any bath - including a bleach bath - may be painful. You may experience dry skin if you use too much bleach or take bleach baths too often. Take a bleach bath no more than three times a week.Immediately apply moisturizer generously.Rinse if your skin doesn't tolerate the bleach bath well.Soak from the neck down or just the affected areas of skin for about 10 minutes.If the concentration of sodium hypochlorite is at the higher end of that range, use less than a 1/2 cup of bleach. In the United States, bleach products may contain 6 percent to 8.25 percent sodium hypochlorite, the Environmental Protection Agency says. Use household bleach and read the product label. standard-sized tub filled to the overflow drainage holes. Add 1/4 cup (about 59 milliliters) to 1/2 cup (about 118 milliliters) of bleach to a 40-gallon (about 151-liter) bathtub filled with warm water.If properly diluted and used as directed, a bleach bath is safe for children and adults.