To prevent a rash, wash affected areas immediately after being exposed to the plant. If you already have a rash, apply calamine lotion to relieve itching.

Poison Hemlock Rash

Poison Hemlock Rash

This noxious weed is one of the fastest-growing weeds in North America today. These poisonous plants can be found in most backyards. Although this is a very toxic plant, that can cause respiratory failure in some humans and other animals, it is a much-needed plant in our ecosystem.

You can quickly identify most of these deadly, poison plants by their purple spot or purple bruise-like blotches on the stems of the plants. Common look-alike plants are The Wild Parsnip, Wild Carrot, and even some types of Queen Annes Lace, and Poison Sumac all of which are considered invasive species.


This very dangerous plant can look similar to other safe plants. Identification is paramount. Not all people will experience severe reactions to this plant. Some will have skin discoloration, dilated pupils, skin rash,  blistering rash, nervous system depression, renal failure, and death.

  • painful rashes
  • skin irritation
  • broken skin
  • asthma-like symptoms
  • asthma symptoms
  • rapid death
  • death of cells

One of North America’s deadliest plants and the most sought-after for removal in local communities.


Poison Hemlock Rash Dangers

Poison hemlock is a plant that grows in wet areas, such as ditches and wetlands. It’s also commonly found in pastures, meadows, and along roadsides. Poison hemlock can reach up to six feet in height and has small white flowers that grow in clusters. Even the dead, hollow stems of this plant can be deadly for up to 3 years after being cut down and left of the group. The plant is toxic to humans and animals and can cause serious health problems if ingested. People who come into contact with poison hemlock may experience a rash that is red, itchy, and blistering. In severe cases, the rash can lead to swelling of the throat and difficulty breathing. If you come into contact with poison hemlock, it’s important to wash the affected area immediately with soap and water. You should also seek medical attention if you experience any symptoms.

This deadly plant is one of the most dangerous types of poison plants and it can cause a very severe rash. It is not a garden plant you want to cultivate close to your home. The rash from poison hemlock is usually red and blotchy, and it can be extremely itchy. If you scratch the rash, it can become infected. Hemlock can also cause swelling and blistering. If you come into contact with poison hemlock, you should wash the affected area immediately with soap and water. You should also see a doctor if the rash is severe.


There are many potential causes of a poison hemlock rash. The most common cause is contact with the plant itself. Poison hemlock grows in many parts of the United States and can be found in fields, meadows, and along roadsides. The plant has small white flowers and can reach up to six feet in height. All parts of the plant are poisonous if ingested, but contact with the skin can also lead to a rash. The plant juice can cause serious stomach upset if ingested through skin contact. Those with sensitive skin should wear gloves and long sleeves while working or walking close to this plant. The delicate leaves can be just as toxic as the mature tall stalks. Most accidental poisoning happens during exposure to poison hemlock on very hot days. The toxic compounds of this dangerous weed can intensify the effects of the toxic alkaloids during hotter days vs colder days.


Other potential causes of a hemlock rash include coming into contact with contaminated soil or water. Animals that have eaten poison hemlock can also pass on the toxins to humans through their fur or waste products. Finally, some people may be allergic to poison hemlock and develop a rash after inhaling its pollen or coming into contact with its leaves or stems.


Symptoms of Poison Hemlock Rash

Poison hemlock rash is a condition that can be extremely dangerous. The symptoms of this condition include a red, itchy rash that can spread quickly and cause severe swelling. If you believe that you or someone you know may have a poison hemlock rash, it is important to seek medical attention immediately.

Case Report source:

We present a case of intravenous poison hemlock injection encountered in the emergency department.

We describe a 30-year-old male who presented to the emergency department after a brief cardiac arrest after injecting poison hemlock. The patient had return of spontaneous circulation in the emergency department but had prolonged muscular weakness and encephalopathy later requiring tracheostomy.


Intravenous injection of poison hemlock alkaloids can result in significant toxicity, including cardiopulmonary arrest, prolonged weakness, and encephalopathy.



If you come into contact with poison hemlock, it’s important to wash the affected area immediately with soap and water. You should also call your local poison control center or go to the emergency room.

Poison hemlock rash is usually not serious and will go away on its own within a few days. However, if the rash is severe or if you have any other symptoms, such as difficulty breathing, you should seek medical attention immediately.

Prevention of Rash

Poison hemlock is a plant that can be found in many parts of the world. It is a member of the carrot family and has a white, carrot-like root. The plant can grow to be six feet tall and has small, greenish-white flowers. Poison hemlock is most commonly found in damp areas, such as along streams or in marshy areas.

People can come into contact with poison hemlock through direct skin contact or by inhaling its pollen. Poison hemlock rash is a reaction that occurs when the plant’s sap comes into contact with the skin. The rash is characterized by redness, itching, and blistering. In severe cases, the rash can lead to second-degree burns.

Hemlock rash is most commonly treated with over-the-counter antihistamines and corticosteroids. More severe cases may require prescription medications or hospitalization. To prevent poison hemlock rash, it is important to avoid coming into contact with the plant. If you must work with or around poison hemlock, wear long sleeves and pants, gloves, and a face mask to avoid exposure to the plant’s sap. NEVER BURN THIS PLANT AS THE FUMES WILL BE VERY TOXIC.


If you come into contact with poison hemlock, it is important to seek medical attention immediately. The rash can be extremely dangerous, and even if you don’t experience any immediate symptoms, the long-term effects of poison hemlock exposure can be devastating. With prompt treatment, however, most people make a full recovery and suffer no lasting damage. If you think you may have been exposed to poison hemlock, don’t hesitate to call your doctor or go to the emergency room.


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