Seven days ago he accidentally squished a caterpillar while pulling out a chair to sit down. Thousands of small grey hairs were embedded into the pads of his fingers.
Five days ago his fingers were covered in tiny blisters, each one centred precisely over the entry point of a hair.
Three days ago the blisters started coagulating, raising and fusing together into a single textured blister.
Two days ago he noticed that while swimming he could feel something moving inside the blister.
Tomorrow he will feel something circling slowly. Something exploring the confines of the blister, looking an escape.