Allergies can affect multiple organs and systems in the body, depending on the allergen and the individual's sensitivity. While some allergies primarily impact specific areas, many trigger a more widespread reaction.
Respiratory System
Seasonal allergies frequently affect the respiratory system, impacting the nose, sinuses, throat, and lungs. This can manifest as a runny nose, sneezing, coughing, congestion, and shortness of breath. [Source: Seasonal allergies most often affect your respiratory system--nose, sinuses, throat, and lungs.]
Skin
Allergies can also trigger skin reactions such as rashes, hives, itching, blisters, or skin peeling. Contact with allergens can directly cause these symptoms. [Source: Allergens that touch the skin can cause a skin rash, hives, itching, blisters, or skin peeling.]
Digestive System
Food allergies often affect the digestive system, leading to symptoms like nausea, vomiting, diarrhea, and abdominal cramps. [Source: Allergy symptoms depend on what allergen is involved. The symptoms can affect the airways, sinuses and nasal passages, skin, and digestive...]
Systemic Reactions
In severe cases, allergies can cause a whole-body reaction called anaphylaxis, a life-threatening condition affecting multiple organ systems. [Source: The most severe allergic reaction is anaphylaxis — a life-threatening whole-body allergic reaction that can impair your breathing, cause a dramatic drop in your...]
Other Organs
Depending on the allergen and the individual's sensitivity, allergies can also impact the eyes, causing itching, redness, and watering. [Source: In common medical practice, allergic disorders are viewed generally as organ diseases which may concern the nose, the lung, the eye, the skin and the...]
In summary, allergies don't affect a single organ; rather, their effects vary based on the type of allergen and individual sensitivity. They commonly affect the respiratory system, skin, and digestive system, but can also trigger systemic reactions.
