Corrosion of third degree of the back of left hand is a severe injury that can result from exposure to strong acids, bases, or other corrosive substances. This type of injury destroys the outer layer of skin, the epidermis, and the underlying layer, the dermis, and can extend to the subcutaneous tissue, muscles, tendons, and bones. The damage is usually deep, painful, and slow to heal, and can lead to scarring, deformity, and disability.
Third degree corrosion can occur from contact with any substance that is highly acidic, alkaline, or caustic, such as sulfuric acid, hydrochloric acid, sodium hydroxide, or potassium hydroxide. It can also result from exposure to fire, electricity, radiation, or extreme cold or heat. The severity and extent of the injury depend on the concentration, duration, and amount of exposure, as well as the type and thickness of the protective clothing or equipment worn.
The symptoms of third degree corrosion of the back of left hand include severe pain, swelling, redness, blistering, blackening, or charring of the skin, loss of sensation or movement, and signs of infection, such as fever, pus, or foul odor. The injury may also affect the function of the hand, such as grip, dexterity, or range of motion, and require surgery, skin grafting, or amputation.
The treatment of third degree corrosion of the back of left hand should be immediate and intensive, and aimed at preventing further damage, reducing pain and inflammation, promoting healing and tissue regeneration, and preventing infection. The first step is to remove the source of the corrosive substance and flush the area with copious amounts of water or saline solution for at least 20 minutes. The next step is to cover the wound with a sterile dressing and administer pain relief and antibiotics as needed. If the injury is severe, the patient may require hospitalization, intensive care, and specialized treatment, such as debridement, skin grafting, or physical therapy.