Scabieshttps://en.wikipedia.org/wiki/Scabies
Scabies is a contagious skin infestation by the mite "Sarcoptes scabiei". The most common symptoms are severe itchiness and a pimple-like rash. In a first-ever infection, the infected person will usually develop symptoms within two to six weeks. These symptoms can be present across most of the body or just certain areas such as the wrists, between fingers, or along the waistline. The itch is often worse at night. Scratching may cause skin breakdown and an additional bacterial infection in the skin. Crowded living conditions, such as those found in child-care facilities, group homes, and prisons, increase the risk of spread.

A number of medications are available to treat those infected, including permethrin, crotamiton, and lindane creams and ivermectin. Sexual contacts within the last month and people who live in the same house should also be treated at the same time. Bedding and clothing used in the last three days should be washed in hot water and dried in a hot dryer. Symptoms may continue for two to four weeks following treatment. If after this time symptoms continue, retreatment may be needed.

Scabies is one of the three most common skin disorders in children, along with ringworm and bacterial skin infections. As of 2015, it affects about 204 million people (2.8% of the world population). It is equally common in both sexes. The young and the old are more commonly affected. It occurs more commonly in the developing world and tropical climates.

○ Treatment ― OTC Drugs
An important feature of scabies is that all family members have the itch syptoms together. Some drugs, such as permethrin, can be purchased over-the-counter (OTC) without a prescription. Treatment should be done by the whole family.
#Benzyl benzoate
#Permethrin
#Sulfur soap and cream

○ Treatment
#10% crotamiton lotion
#5% permethrin cream
#1% lindane lotion
#5% sulfur ointment
  • Magnified view of a burrowing trail of the scabies mite. The scaly patch on the left was caused by scratching and marks the mite's entry point into the skin. The mite has burrowed to the top-right.
  • Acarodermatitis ― Arm
  • You should also check for similar lesions between your fingers or under your breasts. It is also important to check if anyone in your family is experiencing itching as well.
  • Acarodermatitis
  • Acarodermatitis ― Hand. Although not visible in the picture, the finger webs are a characteristic location, so it is important to check carefully between your fingers.
References Scabies 31335026 
NIH
Scabies is a contagious skin condition resulting from the infestation of a mite. The Sarcoptes scabiei mite burrows within the skin and causes severe itching. This itch is relentless, especially at night. Skin-to-skin contact transmits the infectious organism therefore, family members and skin contact relationships create the highest risk. Scabies was declared a neglected skin disease by the World Health Organization (WHO) in 2009 and is a significant health concern in many developing countries.
 Permethrin 31985943 
NIH
Permethrin is a medication used in the management and treatment of scabies and pediculosis. It is in the synthetic neurotoxic pyrethroid class of medicine. It targets eggs, lice, and mites via working on sodium transport across neuronal membranes in arthropods, causing depolarization. This results in respiratory paralysis of the affected arthropod.