DermNet

Uraemic pruritus (also called chronic kidney disease–associated pruritus) is a persistent itch that occurs in people with advanced kidney disease, particularly those receiving dialysis. The itch can be severe, often worse at night, and commonly affects the back, arms, head, or abdomen, significantly impacting sleep and quality of life.

Read more here: https://dermnetnz.org/topics/uraemic-pruritus

Erythema multiforme is an immune-mediated skin condition characterised by distinctive “target” or bullseye-shaped lesions that often appear on the hands, feet, and limbs. It is usually triggered by infections (most commonly herpes simplex virus) and is typically self-limiting, although some cases may involve mucous membranes.

Read more here: https://dermnetnz.org/topics/erythema-multiforme