Skin Encyclopedia

An evidence-based skincare reference by SYNC Beauty.

Encyclopedia

Post-Inflammatory Hyperpigmentation (PIH)

a form of temporary skin darkening that appears after inflammation or injury, such as acne, eczema, or irritation, when the affected area produces excess melanin during healing. It shows up...

Post-Inflammatory Hyperpigmentation (PIH)

a form of temporary skin darkening that appears after inflammation or injury, such as acne, eczema, or irritation, when the affected area produces excess melanin during healing. It shows up...

Hyperpigmentation (Term)

the general term for areas of skin that appear darker than the surrounding tone because of excess melanin, the pigment that gives skin its color. It can show up as...

Hyperpigmentation (Term)

the general term for areas of skin that appear darker than the surrounding tone because of excess melanin, the pigment that gives skin its color. It can show up as...

Sebaceous Filament

a natural, tube-like structure that lines the inside of a pore and channels sebum, the skin's oil, up to the surface. They are a normal part of skin function and...

Sebaceous Filament

a natural, tube-like structure that lines the inside of a pore and channels sebum, the skin's oil, up to the surface. They are a normal part of skin function and...

Cyst

a large, soft, fluid- or pus-filled lesion that forms deep beneath the skin's surface, often appearing as a painful, swollen lump. Cystic lesions are among the most severe forms of...

Cyst

a large, soft, fluid- or pus-filled lesion that forms deep beneath the skin's surface, often appearing as a painful, swollen lump. Cystic lesions are among the most severe forms of...

Nodule

a large, firm, inflamed lesion that develops deep within the skin, often feeling like a solid, painful lump beneath the surface. Nodular lesions represent a more severe form of acne...

Nodule

a large, firm, inflamed lesion that develops deep within the skin, often feeling like a solid, painful lump beneath the surface. Nodular lesions represent a more severe form of acne...

Pustule

a small, inflamed skin lesion that contains visible pus, typically appearing as a red bump with a white or yellow center. In acne it develops when an inflamed follicle fills...

Pustule

a small, inflamed skin lesion that contains visible pus, typically appearing as a red bump with a white or yellow center. In acne it develops when an inflamed follicle fills...