Allergens can be detected by patch test, prick test, blood sampling and other methods.
1. Patch test: according to the nature of the subject to prepare the appropriate concentration of the dip, solution, ointment or the original as a reagent, placed in the patch test device, applied to the subject’s back or forearm flexion side of the normal skin, marked with a marker. Remove the spot test after 48 hours of application, and take the first reading after 30 minutes; take the second reading on the second day after removal.
2. prick test: saline as a negative control, test solution as a positive control, after local disinfection, the experimenter will drop the test solution on the skin of the palm side of the forearm of the subject, with a prick needle vertically into the skin of the drops of the test solution, so that a small amount of the test solution into the skin, the interval distance >2cm, wipe the residual liquid after an interval of 2-3 minutes, assess the results of the test after 15 minutes.
3. Blood sampling: Venous blood sampling for allergen detection can check a variety of allergens.
Allergen detection methods are more, patients also need to go to the hospital for professional specialist examination, according to the actual situation of the corresponding examination as prescribed by the doctor.