Does anyone know what this is on my stretch mark under my armpit? It was super inflamed last month and now it’s been like this for a couple weeks. (Black covering my arm pit hair)

32 45

15 10

28 41

35 44

35 42

27 41

22 11

34 41

41 43

41 46

67 42

40 43

28 42

42 45

28 43

17 11