Sorry guys, but can anyone tell me what these are, they don’t hurt, they have been there for ages, and if I squeeze hard enough yellow stuff pushes out. Cheers

16 2

27 2

39 3

17 2

21 3

11 1

27 3

14 4

18 1

11 3

28 2

15 1

30 3

9 1

1 0

17 2