You call it allergies, but what if it’s part of the healing process? The skin is called the “third lung”, so perhaps in the undoing of internal issues, the skin is healing first. You didn’t say how many times you played it, but perhaps you might be willing to acknowledge that max heal isn’t causing problems, but rather healing you. Dependent upon what is going on in your body, there might be a gradual release of energy that manifested as a skin irritation, but perhaps fewer plays or every other day might allow more healing to take place. Everyone is different, and you will be able to find a proper rhythm for your own body if you can persevere.
Also say how many times you are playing the field per day. Your body is healing internally and the skin is just showing the evidence that the healing is taking place. Self-healing often requires experimentation. Play the field once per day and see how your body reacts. Then up the plays slowly to gradually assist your body to let go of toxins. The field is powerful for sure, so some moderation might be necessary.