black stains and wrinkles on the skin around a person's neck

39aph39 allergy atypical backdrop bacteria black blemish blot body care dermatitis dermatology dirty furrow grime harsh heal health hyperpigmented infection inflame itching lymph mole neck nodes offbeat papilla person physique rash rough rude rugged s scab scurf sear sewage skin slough speck speckle spot stain stains surface symptom taint texture treat uncommon vestige wrinkles young