Mottled skin with a crusty or scaly appearance is caused by sun exposure, and is common in elderly populations, reports Healthline. Individuals with a history of sunburns, or with light skin and blue eyes are at an incre... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Actinic keratosis, a common skin condition, can cause crusty brown spots on skin, typically called age spots or sun spots, according to Healthline. The scaly spots develop when keratinocytes, which are skin cells, begin ... More »

www.reference.com Health Conditions & Diseases Skin Conditions

There are times when black spots on the skin are a normal occurrence, states Petfinder.com. These spots can usually be found in areas with constant friction, such as under the legs. However, black lesions on the skin can... More »

Actinic keratosis, a common skin condition, can cause crusty brown spots on skin, typically called age spots or sun spots, according to Healthline. The scaly spots develop when keratinocytes, which are skin cells, begin ... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Brown spots are caused by an excessive production of melanin due to aging, sun or ultraviolet light exposure, as stated by Healthline. UV light exposure leads to the generation of melanin, according to Mayo Clinic. Melan... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Causes of back cysts include sun exposure, acne, trauma, developmental defects and hereditary diseases, such as Gardner’s syndrome and basal cell nevus syndrome, according to Healthline. Sebaceous cysts and epidermoid cy... More »

www.reference.com Health Conditions & Diseases Skin Conditions

Causes of chapped lips include exposure to air that has no humidity, such as during winter; repeated exposure to the sun, such as during summer; certain medications, such as chemotherapy drugs and constant licking of lip... More »