My daughter is only 6 year and she has dandruff on her scalp I uses Johnson baby shampoo but still it comes again

A. USe spoo Shampoo that is the right shampoo for dandruff and Johnson is very good but it is not for a dandruff issues so you should use the shampoo which is specifically for the dandruff issue suggesting you go for that start using that on a regular basis and do not apply oil to the hair because oil increases dandruff