 [ Symptoms ] blackheads have been a problem for many years of my life what should i look for in a doctor to treat this problem  i have had black and whitehead problems all my life and i am 54 years old i am ready to find a dermatologist that can help me with this issue but do not know what to look for while researching what questions should i ask and how do i know they are reputable [ Disease ] you will need a urine specimen many labs will allow you do this without a doctor is order but you can also confide in the pediatrician and allow him or her to order the proper test this is a very serious problem so it is important that you disclose this to a professional since the safety of your child is paramount knowing the suspected drug would be helpful since drug tests do not test for all drugs