Cellulitis is a common bacterial skin infection that is caused by either Staphylococcus or Streptococcus bacteria. Both of these bacteria occur naturally on the skin. A break or cut in the skin causes the bacteria to enter the body, which leads to an active infection. Cellulitis most often occurs from:

• cracking or peeling skin between the toes,
• insect bites or stings, and
• a skin cut, break or trauma.

Cellulitis appears as a swollen red area of skin that is tender and hot to the touch. Symptoms include chills, fever, muscle ache, fatigue, pain or tenderness in an area with a skin rash or sore. The redness increases in size as the infection spreads. It typically comes on suddenly and spreads quickly. Cellulitis can arise anywhere on the body, but usually appears on the face or legs. Be sure to contact your dermatologist as soon as you observe these symptoms to start an effective treatment.

To prevent cellulitis, be sure to clean any cut or break in the skin promptly with soap and water and cover the wound with a bandage until it scabs over. Watch for redness, tenderness, drainage or pain as these are signs of infection.

A group of viral infections that cause sores on the mouth (oral herpes) or genitals (genital herpes).. There are two types of Herpes Simplex Virus:

Herpes Simplex Virus Type 1 is the most common form of herpes that affects most people at least once during childhood. It is passed from person-to-person through contact with saliva. It is responsible for the formation of cold sores (fever blisters) and canker sores around the mouth and lips. It may also cause an enlargement of lymph nodes in the neck. Generally, this type of herpes does not need any treatment however, oral medications to treat are available. It will disappear on its own in seven to ten days.

Herpes Simplex Virus Type 2 is sexually transmitted either to the genital area or mouth. About one in five adults in the U.S. has this form of the herpes virus, although many people don’t know they have it. The infection is characterized by sores that look like small pimples or blisters, which break open quickly and ooze fluid. This is followed by a period of crusting over and scabbing until the lesions finally heal, which can take up to four weeks. The infection spreads to areas of skin that come into contact with secretions from the blisters. The lesions most frequently appear on the vagina, vulva, penis, scrotum testicles, thighs or buttocks. They may be accompanied by a fever, swollen glands, headache or painful urination. Many people with genital herpes experience sensations of itching, tingling, burning or pain in areas where lesions will develop.

Genital herpes is diagnosed through a viral culture test of the blister fluid from a lesion and blood tests. There is no known cure. Treatment is designed to reduce pain and hasten healing and includes antiviral medications. For people with more severe, prolonged or frequent outbreaks, your dermatologist may prescribe a stronger antiviral drug.

On average, adults with genital herpes have about four or five outbreaks a year. The first outbreak is usually the most severe and more outbreaks occur the first year than any subsequent year. Generally, symptoms begin to appear about two weeks after transmission. The virus takes root in nerve cells, lying dormant until it re-emerges with another outbreak. Outbreaks are known to be triggered by stress, illness or excessive sunlight. It is important for people with genital herpes to avoid sexual contact during an active outbreak to reduce the risk of passing the infection on to a sex partner. However, herpes simplex virus type 2 can be transmitted a few days before the appearance of any lesions. That is why people with this infection are encouraged to practice safe sex and use condoms at all times.

Rocky Mountain Spotted Fever is a bacterial infection transmitted by ticks. It is relatively rare, but can cause serious damage to the heart, lungs and brain. The difficulty lies in diagnosis because many people are unaware that they’ve been bitten by a tick. Three types of ticks transmit the Rickettsia rickettsii bacteria:

• Dog ticks, usually in the Eastern part of the country,
• Wood ticks, usually in the Rocky Mountain states, and
• Lone star ticks, usually on the West coast.

Rocky Mountain Spotted Fever is characterized by a rash that begins as small red spots or blotches on the wrists, ankles, palms or soles of the feet. It spreads up the arms and legs to the trunk of the body. These symptoms take between one and two weeks to appear following a tick bite. The rash is often accompanied by fever, chills, muscle ache, red eyes, light sensitivity, excessive thirst, loss of appetite, diarrhea, nausea, vomiting and/or fatigue. While there are lab tests your doctor can use to diagnose the disease, they take time to complete, so you may be placed on a course of antibiotic treatment right away.

The best way to prevent Rocky Mountain Spotted Fever is to avoid tick-infested areas. If you spend any time in areas with woods, tall grasses or shrubs, wear long sleeves and pants. Tuck pants legs into socks. Wear closed shoes, not sandals. Do a visual check of each member of your family upon returning home. And don’t forget to check your dog for ticks (if applicable).

If you do find a tick, don’t panic. Use tweezers to disengage the tick from the skin. Grab the tick by the head or mouthparts as close as possible to where the bite has entered the skin. Pull firmly and steadily away from the skin until the tick disengages. Clean the bite wound with disinfectant and monitor the bite mark for other symptoms. You can place the tick in a jar or plastic bag and take it to your dermatologist for examination. Because less than one percent of tick bites transmit this bacteria, antibiotics are not generally prescribed unless there are other symptoms present.

Impetigo is a common skin infection usually found in children and infants. It is characterized as single or multiple blisters filled with pus, which pop easily and leave a reddish, raw-looking base and/or honey-colored crust. In most children, impetigo first appears near the nose and then spreads through scratching to other parts of the face, arms or legs. The blisters tend to be itchy.

There are three forms of impetigo:

Ordinary Impetigo is caused by Streptococcal germs. It appears as red sores that rupture quickly, ooze a fluid and then form a honey-colored crust. It primarily affects children from infancy to age two.

Bulbous Impetigo appears as fluid-filled blisters caused by Staphylococcus germs. This contagious infection is carried by the fluid that oozes from the blisters.

Ecthyma, a more serious form of impetigo that penetrates to the second layer of skin (dermis). It is characterized by sores that are painful and/or fluid or pus-filled. These lesions most commonly appear on the legs or feet. The sores break open and scab with a hard yellow-gray crust. It can also cause swollen lymph glands in the affected area.

Impetigo is generally treated with a seven-to-10-day course of prescription oral antibiotics and/or topical antibiotics. The sores tend to heal slowly, so it is important to complete the full course of medications. Please note that over-the-counter topical antibiotics (such as Neosporin) are not effective for treating impetigo.

A particular type of skin infection (cellulitis) that is characterized by blisters; skin that is red, swollen, warm and/or painful to the touch; or by lesions with raised borders that most frequently appear on the face or legs. It also appears as sores on the cheeks and bridge of the nose. It is usually caused by the Streptococcus bacteria and occurs in both adults and children.

Erysipelas requires medical treatment, so you should contact your dermatologist as soon as you suspect you may have this infection. Antibiotics (usually penicillin) are generally prescribed. In severe cases, the patient may need to have antibiotics delivered intravenously.

Ringworm is a common fungal infection, especially among children, that appears on different parts of the body. It is characterized by ring-shaped, scaly and itchy patches of the skin. The patches may blister or ooze fluid. Ringworm is contagious and can be passed from person to person or through contact with contaminated personal care products, clothing or linens. Pets, particularly cats, can also pass on the infection.

The fungi are attracted to warm, moist environments, which is why the most common forms of ringworm include:

• Tinea Barbae, which occurs on bearded areas of the face and neck.
• Tinea Capitus, which occurs on the scalp.
• Tinea Cruris, also known as Jock Itch, occurs in the groin area.
• Tinea Pedis, also known as Athlete’s Foot, occurs between the toes.

Ringworm generally responds well to home remedies and will disappear in about four weeks. In addition to keeping the area clean and dry, you can apply over-the-counter antifungal powders, lotions or creams. In more severe cases, your dermatologist may recommend prescription antifungal medications and antibiotics.