Allergies occur when the body reacts to typically harmless substances, known as allergens, as if they were dangerous. These allergens, found in things like pollen, dust mites, foods, and medicines, can trigger immune responses. Factors contributing to allergies include genetics, environmental exposure, immune system dysfunction, age, and contact with allergens, food additives, infections, stress, hormonal changes, and certain medications. Unlike conditions such as asthma or joint pain, allergies are directly linked to the immune response. If considering anti-allergy medicine for the skin, identifying the allergy’s cause is crucial. Consultation with a healthcare professional for accurate diagnosis and management is recommended.