wo kann man allergietest machen — what are common causes?

The provided knowledge contexts do not contain specific information about allergy tests or their common causes. Therefore, the answer is based on general medical knowledge. Allergy tests are typically performed by allergists, dermatologists, or ENT specialists. Some general practitioners and specialized laboratories also offer them. Common causes of allergies include pollen (hay fever), dust mites, animal dander, mold, insect venom, and foods such as nuts, milk, eggs, or wheat. Medications can also trigger allergies. Diagnosis usually involves skin tests (prick test) or blood tests (specific IgE). Important: Not every positive test indicates a clinically relevant allergy – results must always be correlated with symptoms. The evidence for these statements is practice-based and well-established, but not derived from the given context.