I have a red patch on my breast that looks like a rash like on a baby's bottom. Is Canesten cream an option?

Yes, Canesten cream can be a good option for treating a red rash under your breast that resembles a fungal infection. It is important to keep the area dry, wear loose clothing, and apply the cream as directed for about 10 days to see improvement in the rash and reduce any itching. If you have any other questions or concerns, feel free to ask.