What can I do for a rash on my neck following sun exposure?

To treat a rash on your neck caused by sun exposure, you can use cortate cream or diprosone cream to reduce itching. It is not recommended to take expired Benadryl. Instead, consider taking Reactine (cetirizine) for relief. Since you are taking medications that make you more sensitive to the sun, such as Plaquenil and Elavil, it is important to protect your skin from sun exposure by wearing protective clothing and applying sunscreen regularly. Enjoy your summer and take care of your skin!