Hello Suki,
I believe Acnexel is a type of microneedling radio frequency treatment which can help to improve acne scarring through collagen stimulation, and improve acne through killing acne bacteria and reducing sebum production.
This kind of treatment may trigger acne outbreak in some patients, and I will usually cover with oral antibiotics. Topical antibiotic gel can be applied to the inflamed acne papules as well.
You should consult the doctor who performed the procedure for you and discuss the options available. Hope this helps!
Regards,
Dr Jiwei Wu