Dermititis More Condition_symptoms Whats The Different Between Pityriasis Alba And Sebhorrheic Dermititis?

Whats the different between pityriasis alba and sebhorrheic dermititis? - dermititis more condition_symptoms

I these scales round white spots on the face, do not bite. Would dermititis sebhorrhiec pityriasis alba or, if so, what is the difference between the two conditions?