 [ 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 ] rocephin is very appropriate for cellulitis but may need more than just one injection we often give one injection a day for three days depending on the severity of the cellulitis and response and yes it is very important to remain on oral antibiotics for a period of time until the cellulitis has resolved penicillin is only one of the many choices that can be used