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

23 30

34 33

26 34

16 10

3 0

13 32

16 10

9 30

3 0

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14 10

33 32

8 30

10 30

10 30

6 11