Ooh it could be nail polish then. He had gotten into my polish the night before I noticed it
It looks like something I used to get in the corner of my eye lids. My GP sent me to a dermatologist who said it looks like when people get an allergic reaction to nail polish and I was like... I never paint my nails this has been here for months. He gave me a sample of some cream and it didnt do anything I never really found out what it was ..... But it went away. Looked exactly like that though and never spread.
Looks like eczema patch to me. I get them all the time.