Scarlet fever, also called scarlatina, is a bacterial infection that mainly affects children. If left untreated, it can sometimes lead to severe complications. A distinctive sign of scarlet fever is a pink-red rash. 

Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease that causes systemic, or widespread inflammation. In this kind of disease, the immune system mistakenly attacks healthy tissue.

Scabies is not an infection. It is an infestation of microscopic mites called Sarcoptes scabiei, which can actually live on your skin for months. They reproduce on the outer layers of the skin and then burrow into it and lay eggs. This causes itching and red rashes on the skin.

Some people might notice small bumps on their skin after a mosquito bite, while others experience an allergic reaction, which is far worse, called  skeeter syndrome. 

Shingles, also called herpes zoster, is a painful skin rash that is caused by the reactivation of the varicella zoster virus, the same virus that causes chickenpox.

Sulfites are commonly found in various foods and drugs. “Sulfites” is the general name for six specific substances, which are: sulfur dioxide, sodium sulfite, sodium bisulfite, sodium metabisulfite, potassium bisulfite, and potassium metabisulfite.

The term human seminal plasma (HSP) refers to the components of human semen other than spermatozoa. Allergic reactions to HSP is called seminal plasma hypersensitivity or sperm allergy. This condition is more common among women, affecting up to 40,000 women in the U.S.