shingma, it's 濕用. my mother, my sister and i have one. it's v. useful! it is two-sided. one for rough skin and the other is more fine. as it's stainless steel, v. durable
How to 証實有扁平足? Last year, I suspect my sons have 扁平足. I brought them to Dr. Kong. But the staff said they cannot confirm if they are 扁平足 until 5-6 years old. ?-(