So sorry you are going though this. You may have developed another form of eczema. I started with Allergic Contact Dermatitis, ACD and then a decade later got GD. Have you had the 5 Day Extended Patch Test for ACD? Goggle this exact test for ACD. It tested me for about 78 chemical and natural elements that are common allergens, like latex for metals for example. I am not allergic to those but to 5 others and I must never come in contact with them again. Arm yourself with information. Rashes can have specific symptoms and appearance.
Go to dermnetnz.org and study the various types of eczema. Their photos are helpful. If you have one form of eczema you are likely to get others.
Also I wonder about overdosing on the vitamins in cilantro. Has anyone studied the vitamins and minerals it contains. For example my sister tested too high in her blood for vitamin D. She took calcium with D, and a multivitamin with vitamin D and the doc made her back off stating too much caused side effects. Yet no one on the earthclinic site mentioned getting too many vitamins.