Warts are non-cancerous, benign growths on the skin that are caused by infection from viruses known as human papillomavirus (HPV). The most common type of warts include: common warts, plantar warts (warts that appear on the soles of the feet), flat warts, and genital warts. Warts can present as rough, raised, hard bumps with tiny…
Tinea versicolor, also called pityriasis versicolor, is a common skin infection caused by the overgrowth of a yeast. Typically, it presents as patchy areas of lighter or darker discoloration on the trunk and shoulders that can be scaly in appearance. It can affect anyone, but is more common in teens and young adults. Though the…
Tinea refers to a group of fungal infections which can affect the skin, hair, and nails. The specific name of the infection depends on the affected area of the body. A few common examples include: tinea capitis (infection of the scalp/head) – often referred to as ringworm tinea corporis (infection of the body) – often…
Shingles is a rash caused by the reactivation of the chickenpox virus (also known as the varicella zoster virus or VZV). Classically, the rash affects only one side of the body, within a single stripe or band known as a dermatome. There may be a prodrome consisting of pain, itching, or tingling localized to the…
Scabies is an intensely itchy rash caused by an infestation with a burrowing mite called Sarcoptes scabiei. Infected individuals develop pink papules, excoriations, nodules, and burrows (thread like tracks in the skin). These findings mainly affect the hands, wrists, axillae (armpits), feet, waistline, and genitalia. It is spread by direct, prolonged, skin-to-skin contact with a…
A cold sore is a blister or a cluster of blisters that typically form on or around the lips and mouth. Affected people can experience recurrent bouts of blister outbreaks, often triggered by sun exposure, hormonal fluctuations, stress, illness, or injury. The condition is caused by an infection by the herpes simplex virus. There are…
Molluscum, or molluscum contagiosum, is a common viral skin infection caused by the molluscum contagiosum virus (MCV). This benign condition typically presents with pink, round bumps with a central indentation. The number of bumps can range in number (few to hundreds) and in size (1-6mm). The bumps can appear anywhere on the skin but prefer…
Lyme disease is a tick-borne illness caused by the bacteria Borrelia burgdorferi. It is transmitted to humans through the bite of an infected tick (commonly the deer tick). Early symptoms may include fever, chills, fatigue, headache, body aches, and a characteristic skin rash called erythema migrans. Erythema migrans starts as a small red spot at…
Lice are tiny insects that live on human hair and clothing fibers and can be seen with the naked eye. These tiny bugs attach to the hair and feed on human blood, causing intense itching in the affected areas. People can suffer from 3 different types of infestation: head lice (pediculosis capitis), body lice (pediculosis…
Impetigo is a common bacterial skin infection that typically affects young children. It is most often caused by a bacteria called Staphylococcus aureus or Streptococcus pyogenes. Affected individuals present with sores that break open leading to honey-colored crusts and scabs. Though lesions can be found anywhere, the face (around the nose and mouth) and extremities…
Genital herpes is a sexually transmitted infection caused by an infection with the herpes simplex virus (HSV). There are two types of the herpes simplex virus- herpes simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (HSV-2). Either type can cause genital herpes, but HSV-2 is responsible for most cases. Affected individuals suffer…
Cellulitis is a common bacterial infection of the deeper structures of the skin. The infection presents as a focal area of redness, swelling, and pain which is warm to the touch. These skin findings can be accompanied with fevers, chills, fatigue, and malaise. Cellulitis can affect any part of the body, but is common on…