Leaky scalp because of psoriasis?

Hi,

This might be a strange problem and I haven’t been able to find much help for it so far – so I’m hoping to find anyone with psoriasis here who might help me. I’ve had several psoriatic patches on my scalp for last ten years and few days ago I was working in the garden without any protection for my head and the next morning I woke up, I noticed that my pillow was wet with see-through fluid. I didn’t think much of it until later that day I felt liquid coming down from my forehead – there was no doubt that psoriatic patch was leaking fluid for some reason. I’m guessing it was brought on by sun and not wearing protective hat or something, but I’d really appreciate your opinions as to what might be happening.