A rash has developed over the lower abdomen after an insect bite in the groin. At first I ignored it. Recently I've been trying to treat it. It is itchy and red. Diluted lavendar oil helps with the itching. I've been applying clay to try to heal it. Am I on the track? Is there anything that would be more effective? Thank you.

Petroleum jelly if you have some it may lessen the reddish color