Since yesterday I have redness around my vagina but it does not itch. What can I apply?

You could apply an antifungal cream that is available over the counter at the pharmacy. Yeast infections are typically characterized by redness and/or itching. I recommend using it for 7 days, applying it twice a day, morning and evening. If the symptoms do not improve after this time, it would be advisable to seek medical advice. Additionally, if you experience abnormal vaginal discharge with a fishy odor, genital lesions, or suspect you may have contracted a sexually transmitted infection, it is important to consult a healthcare provider.