The stratum corneum is the outermost layer of the skin and is composed of dead, flattened cells filled with keratin.

The dermis is the middle layer of the skin and is responsible for providing strength and elasticity to the skin, containing blood vessels, nerves, and hair follicles, and producing sweat and sebum.

The hypodermis is the innermost layer of the skin and is responsible for insulating the body, storing fat, and cushioning the body.

Acne is the most common skin disease and is characterized by the formation of pimples, blackheads, and whiteheads.

Eczema is a group of skin conditions that cause inflammation and irritation of the skin. The most common types of eczema are atopic dermatitis, contact dermatitis, and seborrheic dermatitis.

Psoriasis is a chronic skin condition that is caused by an autoimmune disorder, a genetic disorder, and an infection.

Skin cancer is caused by exposure to ultraviolet radiation, a genetic predisposition, and a weakened immune system.

Biophysical techniques used to study skin diseases include microscopy, spectroscopy, and imaging.

Biophysical techniques can be used to treat skin diseases by delivering drugs to the skin, removing diseased tissue, and stimulating the growth of new skin.

The future of biophysics in the treatment of skin diseases includes the development of new drugs and treatments, the development of new biophysical techniques, and the development of personalized medicine.