Hi, my 7yr old has some bumps and rashes on her face. A dermatologist says it is vitamin deficiency without carrying out any test. I find this hard to believe because she takes a fruit a day and eats her vegetables well. So far, his treatment of salicyclic acid(5%) and locarcotene viliform hasn't worked in 6 months of treatment. It has reduced though but it is still very visible. She also takes vitamin supplements but I doubt if the diagnosis is right. What kind of test do I need to carry out?