Folliculitis decalvanshttps://en.wikipedia.org/wiki/Folliculitis_decalvans
Folliculitis decalvans is an inflammation of the hair follicle that leads to induration of involved parts of the scalp along with pustules, erosions, crusts, ulcers, and scale.   It leaves scarring, sores, and, due to the inflammation, hair loss in its wake. There is no certainty about the cause of this disorder, but the bacterial species Staphylococcus aureus has a central role.

○ Treatment ― OTC Drugs
All acne medications can be tried, but in most cases the symptoms are so severe that a doctor should be consulted about oral antibiotics.
#Benzoyl peroxide [OXY-10]
#Bacitracin

○ Treatment
#Minocycline
#Isotretinoin
  • Foliculites decalvans ― It shows repeated inflammation and scars at the border of the scalp and posterior neck
    References Acne Keloidalis Nuchae 29083612 
    NIH
    Acne keloidalis nuchae is a disease characterized by persistent folliculitis at the nape of the neck that forms keloid like scars and ultimately cicatricial alopecia. The disorder is most common in young African American males.