Blisters form as part of the body's immune response to poison ivy and oak and are part of the healing process. The liquid in the ampoules does not contain urushiol, the oil that causes poison ivy or oak rash, so scratching or breaking a blister will not cause the rash to spread. Bacteria from under the nails can penetrate them and cause an infection. Rashes, blisters, and itching usually go away in several weeks without any treatment.
Brushing a poison ivy plant can cause bumps and blisters. The rash can spread from one part of the body to another if the oil from the plant stays on the skin. As we enter the best months for poison ivy problems, let's take a few minutes to learn how skin reacts to it. Poison ivy (and poison sumac and oak) are infected by coming in contact with a plant oil called urushiol.
Oil is in all parts of the plant (leaves, stems, and even roots), so there's no place to handle poison ivy safely. Usually, within 12 to 72 hours of coming into contact with urushiol, you will begin to see a rash. Although poison ivy rash itself does not spread and is not contagious, if other parts of the skin come in contact with the oil, a new rash will develop. As the rash blooms, you may experience itching, redness, swelling, blistering, and crusting of the skin (after the blisters burst).
While creams should be avoided, oral antihistamine pills such as Claritin or Benadryl are OK. Provides temporary relief by blocking histamines released by the body in response to the allergen. The skin itches intensely where the rash will appear. Itching can be so severe that it wakes you up from a deep sleep.
Soon after the skin starts to itch, the rash appears. Most people have an itchy, red, and blistering rash. Because it can sometimes take days for a poison ivy rash to appear, you may have unknowingly come into contact with it indirectly through this equipment and then erupted. However, it is possible to get poison ivy rash if you touch the plant resin that is still on the person or contaminated clothing.
Poison ivy is a vine or shrub that has three shiny leaves and grows in much of the United States and Asia. The rash occurs only where the vegetable oil has been in contact with the skin, so a person with poison ivy cannot spread it through the body by scratching. Finding poison ivy is easy in the United States, where it grows virtually everywhere except Alaska, Hawaii, and some desert areas of the southwest. For these reasons, be sure to clean your skin, clothing, pets, and any outdoor equipment to avoid re-exposure to poison ivy and developing an annoying rash again.
In addition to garden tools, your recreational team may find poison ivy and cause a rash. Poison ivy rashes may appear to spread if urushiol oil gets trapped under the nails and the itch is scratched. But botanists have never documented poison oak and poison sumac growing in the state of Iowa, according to the Iowa Department of Natural Resources. If you scratch a poison ivy rash, bacteria under your nails can cause skin to become infected.
The only way to develop a case of poison ivy is through direct contact with the plant or by touching a fomite, such as clothing or gardening tools, that has been contaminated with urushiol. One of the most difficult realities of poison ivy is that it can be contracted by touching something in which the oil is, without ever touching the plant. Wash everything else that may have been in contact with poison ivy oil, clothing, pets, tools, door handles, and any other hard surface. In addition, if for some reason a person burns poison ivy leaves, the oil can travel through the air and cause a rash in the nostrils or other respiratory tract.