There are several creams and remedies that can help with a rash under the breasts. Here are some options:

1. Under Breast and Cleavage Rash Cream: This cream is made with matcha green tea and pure essential oils and is designed to provide relief from chafing and itching.

2. Boudreaux’s Butt Paste: This diaper rash remedy has been recommended by some readers as a solution for under-breast rash. It helps to clear up the rash and keep the area dry and free of irritation, especially in humid weather.

3. Monistat Chafing Relief Powder Gel: This product is designed to prevent chafing and irritation and can be used to treat under-breast rash. It has a silky texture and is easy to apply.

4. Cetaphil Healing Ointment: This lotion is recommended by doctors as a barrier protection to reduce irritation and keep the skin barrier strong. It is ideal for soothing and protecting delicate, sensitive areas.

5. Lotrimin AF Cream: This anti-yeast cream is recommended by doctors to treat intertrigo, a common cause of under-breast rash. It can be applied directly onto the infected area of the skin.

6. Zeasorb AF: This powder is recommended by doctors as the best powder for under-breast rashes. It helps to keep the area dry and reduce inflammation and moisture.

Ultimately, the best approach for any individual woman may vary, and it may take some trial and error to find the most effective solution. Other remedies that can help ease under-breast rash include using an antifungal powder or cream, applying a barrier cream, and washing the area with a gentle soap or soap substitute. It is also important to keep the area dry and reduce rubbing of skin on skin. If the rash persists or is severe, it is recommended to speak to a doctor or pharmacist about which treatment is best.