<s>[INST] Okay so I thought I may be getting a UTI and so they prescribed me septra and had some sort of a recaction so now right as you would insert A tampon there is a sore and I have a serious yeast infection and there is swelling by my butt crack and it itches my email address is  YYYY@YYYY [/INST] Hello, Welcome to Chat Doctor, The symptoms and the history are suggesting me that you are having fungal infection. The fungus is the normal comedians of the genitals which are kept under control by helpful organisms when ever there is an imbalance in the environment this fungus will activate and produces the symptoms of fungal infection. As you are having the symptoms of the fungal infection you have to follow1. Good hygiene2. Keeping that area clean and Chat Doctor. Topical Antifungal cream like Ketoconazole 4. Oral Antihistamine. Thank you. </s>