Toxic epidermal necrosishttps://en.wikipedia.org/wiki/Toxic_epidermal_necrolysis
Toxic epidermal necrosis is a type of severe skin reaction. Early symptoms include fever and flu-like symptoms. A few days later the skin begins to blister and peel forming painful flaky areas. It is important that mucous membranes, such as the mouth, are also typically involved. Complications include dehydration, sepsis, pneumonia, and multiple organ failure.

The most common cause is certain medications such as lamotrigine, carbamazepine, allopurinol, sulfonamide antibiotics, and nevirapine. Risk factors include HIV and systemic lupus erythematosus. Treatment typically takes place in hospital such as in a burn unit or intensive care unit.

○ Treatment
This is a serious disease, so if your lips or mouth are affected or your skin becomes blistered, see your doctor as soon as possible.
Suspicious drugs should be discontinued. (e.g. antibiotics, non-steroidal anti-inflammatory drugs)

  • Characteristic skin loss of Toxic epidermal necrosis
  • TENS ― day 10
  • Necrolysis epidermalis toxica
  • Early-stage blisters may quickly progress to involve the entire body within a few days.
References Stevens–Johnson Syndrome and Toxic Epidermal Necrolysis: A Review of Diagnosis and Management 34577817 
NIH
Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) are rare diseases that are characterized by widespread epidermal necrosis and sloughing of skin. Regarding treatment, cyclosporine is the most effective therapy for the treatment of SJS, and a combination of intravenous immunoglobulin (IVIg) and corticosteroids is most effective for SJS/TEN overlap and TEN.
 Toxic Epidermal Necrolysis: A Review of Past and Present Therapeutic Approaches 36469487
Toxic epidermal necrolysis (TEN) is a serious skin reaction caused by certain medications and immune system activity, resulting in large-scale detachment of the outer skin layer (epidermis), affecting more than 30% of the body's surface. TEN has a mortality rate of over 20%, often due to infections and breathing difficulties. Stopping the medication causing the reaction, providing supportive care, and using additional treatments can improve the outcome. Recent studies have shown that drugs like cyclosporine, tumor necrosis factor alpha inhibitors, and a combination of intravenous immune globulin and corticosteroids can be helpful, based on randomized controlled trials and analyses of multiple studies.
 Toxic Epidermal Necrolysis and Steven–Johnson Syndrome: A Comprehensive Review 32520664 
NIH
Recent Advances: There is improved understanding of pain and morbidity with regard to the type and frequency of dressing changes. More modern dressings, such as nanocrystalline, are currently favored as they may be kept in situ for longer periods. The most recent evidence on systemic agents, such as corticosteroids and cyclosporine, and novel treatments, are also discussed.