Scabies
Why it happens: Scabies is caused by an infestation of the arachnid Sarcoptes scabiei, or the human itch mite. Its symptoms are a result of the body’s allergic response to the mites burrowing and traveling under our skin, as well as the later laying of their eggs. The mites are spread through close prolonged contact, including during sex.
Symptoms and treatments: Scabies is characterized by an intense itch, along with pimple-like rashes, at the site of infestation, which is usually along our arms or feet. People with weaker immune systems tend to develop more intense infestations and crusty-looking rashes. The mites can be treated with topical or oral antiparasitics, but people can get them again in the future. The first time someone is affected, it can take up to eight weeks for symptoms to appear, but as little a day for subsequent encounters.
