Hello,
Antibiotics for gram negative bacterial infection are different and you need to get the sore cultures for bacterial or fungal infections and then specific treatment can be started. The scalp sores can be due to perifolliculitis scalp. It is characterised by small, very itchy pustules within the scalp, often most troublesome on the frontal hairline. The scalp should be washed with a mild normal shampoo as often as desired. Antidandruff shampoos containing antifungal agents such as ketoconazole or ciclopirox are sometimes helpful. Apart from that you need topical and oral antibiotics, antihistamines, oral steroids and topical tretinoin.
My sincere advice is to get it examined from a dermatologist. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing
I guess I forgot to ask the question in all of that. Is there some other way of treating/curing the scalp infection without further aggravating the possible gram-negative folliculitus (caused by the prolong use of the antibiotic)?
P.S. Confirming the gram-negative folliculitus with a doctors appointment.