@jeanne5009 My apologies for not responding to you. I have autoimmune issues, and kidney disease caused by hyperactive immune system. It seems to me since the rash is localized to scalp and back, it may be a contact issue. Bedding, or new shampoo/conditioner, perhaps? New laundry soap? Change in vehicles, now receiving a different type of light? Change in medication [either dosage or type, including over the counter]? Change in anxiety or stress levels, sleep patterns, or diet? Having a compromised system due to your cirrhosis may lead to hypersensitivity from nothing that you can put a finger on. Do oatmeal baths work to calm the skin down? I hope we have given you some ideas here.
Ginger