Some rashes, such as poison ivy, often go away on their own. Skin rashes can be both unsightly and uncomfortable. Also, reactions to certain drugs, such as narcotic pain medications (opioids) can cause itchy skin. Menthol is an essential oil found in plants of the mint family. They are all members of the same family and contain an oil called urushiol that causes an itchy skin rash in about 50 to 70 percent of the population. Allergic reactions like itching can escalate quickly, so it is important to be prepared.

Many skin reactions are harmless, but if you are worried, especially if accompanied by other symptoms, consult your doctor.

The poison ivy plant, known by the botanical name Rhus radicans, is the most well-known vine that commonly causes allergic contact dermatitis. Anemones, daisies, clematis, snow-on-the-mountain (a Euphorbia), and hellebore are among the plants which can cause skin rashes and irritation if handled. Skin reactions like hives, rashes, or bumps from insect bites and stings can cause a great deal of discomfort. Plants cause three types of rashes: photocontact dermatitis, irritant contact dermatitis and allergic dermatitis. According to the U.S. National Library of Medicine, simple skin rashes (contact dermatitis in particular) are caused by touching things that damage the skin — chemicals, cosmetics, dyes, and some toxic plants. The stinging nettle is also an herb that has hairs that cause the itching. Poison ivy, poison oak and sumac are plants that can cause redness, blotchy spots, itching, blisters and/or swelling upon contact. Poison plants - Poison ivy, poison sumac, poison oak are some of the plants that trigger allergic reactions when one comes in contact with them, resulting in an itchy rash. Poison Ivy, Poison Oak and Sumac Rashes. Poison ivy rash does not spread to others and is not contagious. Read more about some of the causes of itching.. In some cases, sunlight may exacerbate the rashes. If the spine gets under your skin, it can cause itchy, bumpy eruptions. Some are caused by minor irritations or allergies, while others are related to more serious infections. Symptoms would disappear within two weeks. It can also be brought about by boredom. Poison ivy or poison sumac is a plant that causes skin rashes when you come into contact with the leaves. Common causes of rashes include: Coming into contact with something that causes an allergic or otherwise adverse reaction, such as soap, laundry detergent, beauty products, latex, rubber, elastic, dye in clothing, or poisonous plants Even when dried-up, their leaves and stems can cause a rash.Here are a few things that may help you recognize them: Poison ivy: It can be a vine or shrub, and it can be found throughout most of the states except in Alaska and Hawaii. For example, insect bites and autoimmune conditions along with fungal, bacterial, and viral infections can all cause a rash to appear. poisonous plants, such as poison ivy and sumac; chemicals, such as latex or rubber; Medications. Itching can be intense and persistent, possibly accompanied by hives and pain. Localized allergic reactions can be treated with topical or oral corticosteroids, antihistamines and ice to relieve the itching and swelling. Other causes of rashes on upper arms include eczema, psoriasis, or scabies. 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