 The
skin can develop over 1000 ailments
 Most disorders result from allergies or
bacterial, viral, or fungal infections
 Burns
and cancer are less common, but
more damaging
 The
following are the most common skin
infections
 These infections are caused by bacteria,
viruses, or fungus
 Itchy, red, peeling
 Fungal
of skin between toes
 Inflammation
of hair follicles and
sebaceous glands
 Bacterial
 Small, fluid-filled
blisters that itch and
sting
 Herpes simplex infection (viral)
 Water-filled
lesions that develop yellow
crust and eventually rupture
 Bacterial
 Red
lesions covered with dry, silvery
scales
 Bacterial and viral infections
 Contact
dermatitis:
• Itching, redness, and swelling of the skin; leads
to blistering
• Caused by exposure of skin to chemicals that
provoke allergic reactions
A
burn is tissue damage and cell death
caused by intense heat, electricity, UV
radiation (sunburn), or certain chemicals
(such as acids)
 Classified
according to severity
 1st
degree: only epidermis is damaged.
Skin becomes red and swollen.
 Healing in 2-3 days by regeneration
 2nd
degree: damage to epidermis and
upper layer of dermis. Skin blisters.
 Regeneration usually occurs if infection is
prevented
 3rd
degree: entire thickness of skin is
destroyed.
 Since nerves are also destroyed, victim
doesn’t feel the pain.
 Regeneration impossible, skin must be
grafted from unaffected tissue
 Facial
burns are dangerous because the
respiratory passages may become
swollen and lead to suffocation
 Joint
injuries are troublesome because
scar tissue limits joint mobility