Keloid scar When skin is injured, fibrous tissue called scar tissue forms over the wound to repair and protect the injury. In some cases, extra scar tissue grows, forming smooth, hard growths called keloids.
Keloids can be much larger than the original wound. They’re most commonly found on the chest, shoulders, earlobes, and cheeks. However, keloids can affect any part of the body.

Although keloids aren’t harmful to your health, they may create cosmetic concerns.

Keloids come from the overgrowth of scar tissue. Keloid scars tend to be larger than the original wound itself. They may take weeks or months to develop fully.

The symptoms of a keloid can include:

a localized area that is flesh-colored, pink, or red
a lumpy or ridged area of skin that’s usually raised
an area that continues to grow larger with scar tissue over time
an itchy patch of skin

Kojic Acid As a seemingly endless number of nature-based products take their turn trending in the skin care marketplace, the ancient metabolite kojic acid is enjoying a resurgence in popularity for the treatment of melasma.
Kojic acid is produced by several species of fungi and is a by-product of the fermentation process of malting rice for sake. The sometimes-controversial skin lightening agent — also used on cut fruits to prevent browning and in seafood to preserve coloring — reduces hyperpigmentation by inhibiting the production of tyrosinase in synthesis of melanin. A potent antioxidant, kojic acid also possesses antibacterial and antifungal properties and is used by patients at concentrations ranging from 1% to 4%.