I got an injection and medication for uti infection but now the outside of my vagina is itchy and irritating what could this be? im still on meds

Altered flora: Antibiotics often alter the normal bacterial flora in the vagina and predispose to yeast infection that may be causing the itching. It would be prudent to consult your doctor as s/he has more information about your health.

Itchy: Common problem related to treating bacterial infections( like your uti) with antibiotics, is developing a yeast infection. You need to see your doctor to prescribe a anti fungal medication and to further evaluate your problem if needed. :)

Monillia Infection: When a female is given antibiotic it is not rare that she will develop an fungus overgrowth in the vaginal vault. Normal in vaginal canal are many organisms. They are kept in balance by the other organisms. When you take antibiotics you kill off many good bacteria along with the bad and then Monilla fungus grows wild. Your doctor can prescribe a pill to take one time to correct.