Can You Be Allergic to Weed?

Can You Be Allergic to Weed?

Is it possible to be allergic to weed? The only thing nobody is allergic to is water, so some people are allergic to weed. Allergic reactions do not manifest in the same way. Specific nuances in the allergen and the people usually determine them.

Some people may have THC allergy. Others may have hemp allergy, among others. On the other hand, a person may develop a rash from smoking weed reacting differently to CBD oil

The key to handling the reaction is knowing its cause.

Symptoms of Being Allergic to Weed

You could be wondering, “am I allergic to weed?” Symptoms of marijuana allergy depend on the type of exposure. If your exposure is by touching, you are likely to have an outbreak of hives, rashes, or angioedema. In rare cases, some people develop hives from smoking weed Angioedema refers to swellings that form beneath the skin due to the accumulation of fluids.  

Inhaling weed pollen, crashed weed leaves flowers, and other allergens from weed can cause nasal allergy symptoms, including sneezing and a runny nose. The allergens that affect the nose also cause eye allergy symptoms. Your eyes may turn bloodshot, itch, swell and get watery. If these happen to you, you are allergic to pot. 

For a person with asthma, inhaling weed, as mentioned above, may trigger an asthma attack.  

There have been some reported cases of an anaphylactic reaction. It is important to note that only people who are allergic to hemp seed suffer from anaphylaxis. Anaphylaxis, in this case, therefore, may be referred to as hemp seed allergy.  

A person who otherwise doesn’t have an allergic reaction to weed may experience an adverse reaction to weed if they had certain types of food alongside it. These allergies are caused by cross-reactivity between the foods.

Cross-reactivity is not necessarily one of the signs you’re allergic to weed. It comes due to the interaction between proteins and allergens found in weed and the said foods. Some foods which cross-reactions have been reported include hazelnut, tomato, peach, banana, and grapefruit. The resulting allergic reactions are usually severe. 

Cannabinoid hyperemesis syndrome is also categorized as an allergic reaction. In these cases, cannabis allergy is symptomized by persistent cycles of nausea and vomiting in chronic weed smokers. The user’s body develops an intolerance to cannabis.

Risk Factors of a Cannabis Allergy

Although many people are allergic to weed, symptoms vary widely from person to person. It is, therefore, difficult to pin these reactions down to specific risk factors. People with asthma may suffer attacks after inhaling weed pollen or related particles. 

Weed Allergy Diagnosis

Weed Allergy

Cannabis marijuana reactions are mostly similar to other allergies. The overlap in symptoms usually makes it difficult to tell whether a reaction is due to marijuana or due to other allergens without the help of a doctor. 

Marijuana allergy tests include a skin prick or blood serum test. In the event, none of these tests are available, the doctor can diagnose you based on the history of your exposure to weed and your reactions.

Marijuana Allergy Treatment

Seeking the advice of a doctor concerning treatment is as critical as getting a diagnosis. You would be best served by going to an allergist for treatment. The course of treatment may involve the use of common antihistamines. Besides antihistamines, nasal sprays can help reduce symptoms to the respiratory tract. 

In the case of Cannabinoid Hyperemesis Syndrome, the only way out is to stop smoking weed. Symptoms go away when you stop smoking.


If your symptoms are severe like anaphylaxis, you may need to find out the food that caused a cross-reaction and avoid using it alongside marijuana. If the cause of the reaction is touching weed, you might need to avoid it. 


Although only a small percentage of users experience it, marijuana allergy is real. It is necessary, however, to distinguish between real and false marijuana allergy. If harvested weed is not well stored, it may contain mites, which can cause rashes to anyone who touches them.

Poorly dried weed can also have molds, which can cause respiratory problems when smoked. The key to understanding your marijuana allergy is first ensuring that the pot you use is clean. You can also avoid allergies by using high quality processed marijuana products such as CBD oils, capsules, or gummies for general wellness or management of certain health conditions. There have been few reported cases of allergic reactions to CBD as compared to people feeling itchy after smoking weed and such other symptoms.  

Good read if you want to know more about CBD: CBD and Anxiety & Depression

Dwight K. Blake Written by: Dwight K. Blake

Dwight was a Mental Health counselor at Long Island Psychotherapy & Counseling in Westbury, New York for more than 15 years. He believes that CBD is the prime solution to this mental illness and more-- with proper research, medical acknowledgment, and application.
Through his work at AmericanMarijuana, together with the rest of the team, he wishes to provide everyone with genuine results and high-quality product reviews for everyone to enjoy for free.

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