Rashes and Poison Ivy

A poison ivy (or poison oak or sumac)rash is caused by an oil in the plants called urushiol. The oil is present in the leaves, roots and stems of the plant. Exposure to urushiol causes an allergic reaction or rash in many people. Exposure to the plant directly, or secondary exposure by contact with exposed clothing, pets or gardening tools, may cause a reaction.

Other rashes can be caused by exposure to other allergens, such as grass or animal dander, or by excessive exposure to heat (heat rash).

Symptoms

Common symptoms of a poison ivy/oak/sumac rash may include:

• A red rash at the site of exposure, within a few hours to a few days of contact
• Itching where the contact occurred
• Swelling
• Potential red streaks, bumps or blisters

Rashes are generally not contagious when caused by poison plants, allergens, or heat.

Prevention

Some of the best ways to prevent rashes caused by poisonous plants, allergens, and heat are:

• Learn how to identify poison ivy and poison oak plants and avoid them
• Wear protective clothing including long pants, long sleeves and gloves
• Wash your skin immediately after contact with poisonous plants or allergens
• Wash contaminated clothing and shoes so future exposures do not occur

Treatment

Mild cases of poison ivy or poison oak rash can be treated by washing affected areas, including under fingernails, with soap and water or alcohol immediately after exposure. Itching and blistering may be relieved by applying cold compresses, calamine lotion or hydrocortisone creams. Taking cool baths or non-prescription antihistamine may also alleviate itching.

When to Seek Medical Attention

Moderate or extreme cases of this rash may require the care of a physician.

You should see a healthcare professional if:

• The rash is widespread or severe
• The rash is on a sensitive area such as the face, mouth, eyes or genitals
• Blisters are present
• Fever over 100F occurs
• If you experience a severe allergic reaction with swelling and/or difficulty breathing, you should call 911 or seek the immediate care of an emergency room

Whether you have a rash from poison ivy, allergens, heat, or something else, Physicians Urgent Care can help. With walk-ins appointments and online reservations, we can offer quick relief for your rash symptoms.