If you happen to’ve just lately tried weed for the primary time anticipating medicinal aid however as an alternative discovered your self swelling, sneezing, or rubbing itchy eyes, you might have a weed allergy. 


The signs of a cannabis allergy are just like the seasonal allergy symptoms and embrace the next: 

  • runny nostril 
  • sneezing 
  • itching 
  • swelling
  • watery eyes
  • rashes
  • hives 

In extreme instances, anaphylaxis can develop. This acute allergic response to cannabis most usually happens after the ingestion of hemp seeds. So what precisely is anaphylaxis? It may end up in swelling of the throat, issue respiration, and passing out.

If not handled instantly, anaphylaxis may be deadly. If you happen to suspect that you might have an allergy to cannabis, discuss to your physician about carrying an epinephrine injection in case you go into anaphylactic shock. 


Due to marijuana’s legally grey standing (it’s federally prohibited however legalized in most states), and sophisticated and various biochemical structure, discovering a clinic that can check is likely to be difficult.

skin prick allergy test

Pores and skin prick allergy check. Supply: iStock

Individuals who suspect that they’ve an allergy might be able to take a pores and skin prick or blood check. Leaves, buds, and flowers from the C. sativa plant could also be utilized in a pores and skin prick check. Blood exams are much less frequent, much less dependable, and extra value prohibitive. 


The dearth of analysis on cannabis immunotherapy makes it tough to prescribe a typical remedy plan. This can seemingly stay the case till federal cannabis prohibition is lifted—it’s almost inconceivable for researchers to entry cannabis for the scientific discovery wanted to develop this type of remedy.

Consequently, the easiest way to deal with a cannabis allergy is to keep away from coming into contact with it for those who suspect you might be allergic. If you happen to do expertise an allergic response, contact your physician. Relying on the severity of the response, your physician will seemingly prescribe an antihistamine to help in managing the signs.

Allergic reactions ought to resolve on their very own inside weeks as soon as cannabis publicity is eradicated. 

If you happen to work in a cannabis processing or producing facility otherwise you in any other case can’t keep away from coming into contact with the plant, the usage of antihistamines, gloves, facemasks, and inhalers might cut back the severity of your signs.

Due to the small chance of growing anaphylaxis, you will need to seek the advice of along with your physician about threat administration.   

Hashish is an Allergen

Hashish sativa, like all different crops, comprises pollen, an especially pervasive and worsening allergen subtype. It additionally comprises proteins frequent to different crops which were implicated within the improvement of meals allergy symptoms. Current research present that Can s 3, the nsLTP (non-specific lipid switch protein) of Hashish sativa constitutes an necessary allergen as a result of Can s 3-primarily based diagnostics shows the very best efficiency. 

Consequently, sensitization to the allergen Can s 3, the ns‐LTP from Hashish sativa, might result in a broad number of cross‐reactions. This basically means the potential of cross‐reactivity with tobacco, pure latex and plant‐meals‐derived alcoholic drinks.

In a 2019 report, Canadian researchers describe potential allergens accountable for cannabis allergy embrace THC, four nonspecific lipid switch protein (Can s 3),5, 6 and others. 

An fascinating preliminary research in 2018 demonstrated that marijuana use is related to sensitization to particular allergens, together with molds, mud mites, crops, and cat dander. In lay phrases, use of marijuana can create sensitivities to the above allergens that didn’t in any other case exist within the person. 

The authors suggest to make use of the sIgE hemp assay (crude extract utilizing an ImmunoCAP method) the place there’s a suspicion of a cannabis allergy as a destructive consequence makes a cannabis allergy unlikely.  Nevertheless, a optimistic sIgE hemp at all times wants extra diagnostic work-up with a Can s Three primarily based diagnostic.

Clearly, extra analysis must be carried out to ascertain IgE reactivity profile in Hashish sativa.

Are Hashish Allergy symptoms Turning into Extra Widespread? 

With the fast progress of the authorized cannabis business comes elevated alternative for publicity. Along with the cannabis used for medicinal functions, hemp (a non-psychoactive number of the Hashish sativa plant) is utilized in 1000’s of merchandise. In accordance with the American Academy of Allergy Bronchial asthma and Immunology (AAAAI), this makes publicity and subsequent sensitization to cannabis extraordinarily frequent.

Individuals might develop a sensitivity to cannabis by consuming or touching cannabis merchandise.  The AAAAI predicts that stories of cannabis allergy symptoms will turn out to be more and more prevalent because the business expands.

However the medically-based utilization of cannabis the augmented curiosity for extremely nutritious meals has elevated the widespread availability and use of hemp seeds ( a super-food excessive in protein)within the meals business, which might contribute to the frequency of hemp seed allergy and presumably cannabis cross-reactivity. 

Along with hempseed and hempseed oil, derivatives of dried flowers or resinous extract may be integrated in meals and ingested. Since each hemp and cannabis can induce clinically related allergic cross-reactivity one can get a hemp allergy with out being uncovered to hemp which might in flip manifest as extreme anaphylaxis or different lesser signs.

Why you don’t hear about cannabis allergy symptoms

A 2016 Photodetection in Move Cytometry overview decided that the prevalence of cannabis allergy symptoms is probably going underreported because of the plant’s illegality in some states and in federal regulation. The authors defined that way more individuals than the general public might take heed to are liable to growing cannabis sensitivity. These teams embrace however aren’t restricted to:

  • Law enforcement officials who seize unlawful pot
  • Leisure customers who inhale or ingest cannabis merchandise
  • Hashish growers
  • Laboratory scientists who check the plant

Others might inhale cannabis allergens whereas strolling the road or come into contact with pot when in proximity to somebody actively utilizing cannabis merchandise.

Pores and skin-to- cannabis contact might lead to urticaria (rash) or contact dermatitis, inhaling cannabis might lead to season allergy-like respiratory irritation, and ingesting cannabis might result in gastrointestinal discomfort, swelling, and in extreme instances, anaphylaxis. 

If You might be Allergic to These Issues, You Could also be Allergic to Hashish 

A 2017 Revue de Pneumologie Clinique overview discovered that cannabis allergy symptoms could also be triggered by meals which have an analogous chemical composition to weed. This phenomenon is named cross-allergy or cross-reactivity. It happens when the physique has an allergic response to at least one meals, however then turns into delicate to different meals or crops that comprise comparable proteins to the unique allergy inducing plant.

When you’ve got a historical past of allergy symptoms, you should utilize your data about your meals sensitivities to make an informed guess concerning the chance of growing a cannabis allergy. Sure meals comprise a molecular composition just like marijuana. When you’ve got an allergy to any of the next meals, you might be delicate to cannabis as properly: 

  • tomatoes 
  • nuts
  • apple
  • peaches
  • bananas
  • grapefruit
  • orange
  • chestnuts
  • eggplant