Itchy rashes on neck and scalp after starting LDN

Started LDN 1.5mg 1 week ago and have started getting itchy rashes on my neck and little hives on my neck, but also a bit of an itchy scalp...it's on and off throughout the day

Is this a side effect anyone's experienced?

I really hope I'm not allergic to LDN as I have so much inflammation in my body from autoimmune diseases :(