I would check the ingredients in your oral care products. Colgate Total contains triclosan (as an active ingredient )and triclosan reacts with chlorine in tap water to form chloroform - which may irritate his skin.
Can you get hold of tea tree oil? It is a powder anti septic essential oil from Aromatherapy. Use a q-tip to apply after cleansing the area. Do it daily. Alternatively, garlic juice can also be applied.
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A HomeSpun Cure for Plantars Wartby
A plantars wart is a small lesion that forms on the toes or sole of the foot. Generally, it resembles a cauliflower in appearance with small black dots in it’s center. Planters warts...