Not sure if it’s a sac or core? Popped this out of my boil on my thigh last night. Never had one like it. I have HS. It was rubbery and firm

35 13

58 43

36 12

33 42

41 20

47 46

42 42

46 42

267 22

90 22

95 21

32 12

56 22

49 42

44 43

53 41