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Skin Care Glossary

Refer to our skin care glossary to learn more about skin care.


Grade I

Grade II

Grade III

Grade IV

Grade I is considered acne simplex, and may include open or closed comedones. Inflammatory lesions and cysts are not typically seen. Scarring is unlikely in acne simplex as the lesions tend to be superficial; however, patient excoriation may lead to hyperpigmentation or texture changes.

Grade II is also considered acne simplex, and will include the open or closed comedones seen in Grade I, as well as papules and pustules. Cystic lesions and scarring are uncommon.

Grade III is a form of acne vulgaris, where inflammation and bacterial lesions are typical. Open and closed comedones may also be seen, and scarring will be more likely than with the lower acne grades. Medical prescription intervention may be necessary.

Grade IV sufferers experience deeper cystic and nodular lesions, as well as papules, pustules, and comedones. Scarring is very common due to the depth of the lesions. Medical prescription intervention may be necessary.


Skin Type
Skin Color
Reaction to the Sun

Typical Sensitivity to
Chemical Peels

Common Hereditary Background
Very White or Freckled
Always burns, but never tans
Very Resilient

  • Nordic
  • Scandinavian (Swedish, Danish)

Usually burns

  • Irish
  • English
  • Welsh

White to Olive
Mildly burns, and tans relatively well
Moderately Responsive

  • Asian
  • Mediterranean (Italian, Greek)

Rarely burns, but tans well

  • Hispanic
  • Middle Eastern
  • African American
  • Native American

Dark Brown
Very rarely burns, but tans easily
Moderately Sensitive

  • Hispanic
  • Middle Eastern
  • African American
  • Native American
  • Southeast Asian

Least likely to burn, but tans very darkly
Very Sensitive

  • African American
  • Southeast Asian


Stage I Aging
“No Wrinkles”

Stage II Aging
“Wrinkles in Motion”

Stage III Aging
“Wrinkles at Rest”
Stage IV Aging
“Only Wrinkles”

Ages 20-30

Ages 30-40

Ages 40-55

Ages 55+

  • Early mid-photoaging
  • Dull skin tone
  • Hyperpigmentation – uneven tone and texture
  • First expression lines
  • Fine wrinkles
  • Moderate photoaging
  • Thinning skin
  • Deeper lines and wrinkles
  • Dehydrated skin
  • Advanced photoaging
  • Thin skin with loss of elasticity
  • Deep wrinkles/dehydrated skin – loss of water volume in the skin
  • Reduction in skin’s elasticity and firmness
  • Skin with visible signs of external stress from smoking/alcohol/pollution

  • Severe photoaging
  • Fragile, thin, crepe-like skin
  • Hyperkeratinization of the skin – rough to the touch
  • Loss of definition of facial contours – flaccid skin
  • Very deep lines and wrinkles
  • Loss of metabolic function

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