Conversation: The conversation between human and AI assistant.
[|Human|] my 9 year old sons skin color ( naturally he has very very soft skin to compare with other kids)is getting darker day by day. This problem started after his one month swimming class which he took 2 years before. will he get back his original (originally he was light brown, but now he is totally black) color using any treatment?
[|AI|]  Hi, color of skin is due to genetic base and environmental effects. For your son, you protect his skin from sun rays and environmental pollutants. Improve his health with nutritional supplements. Tanning of skin should be avoided with the help of sunscreen lotion. Investigate to rule out internal diseases. Chlorinated water may stimulate hyperkeratosis, so tell him to avoid swimming, or do with protection.  Remember hyperkeratosis without any cause requires no treatment, unless cosmetically you worry... Ok