How long does it take to see the results of a skin test?

When some infectious diseases occur, when you go to the clinic or hospital for an injection, the doctor will usually do a skin test on the patient. The so-called skin test is the abbreviation of a skin sensitivity test. The reason for doing a skin test is to avoid allergic reactions after penicillin injection. Once penicillin allergy occurs, there will be great danger and may even lead to death. Therefore, it is necessary to do a skin test before injecting penicillin. So how long after the skin test will you see the results?

How long does it take to see the results of a skin test?

Penicillin is a common antibiotic. There are three main ways to administer penicillin: oral administration, intramuscular injection, and intravenous drip. Oral penicillin does not require a penicillin skin test. If penicillin needs to be injected intramuscularly or intravenously, a penicillin skin test is required. However, many people have done penicillin skin test but do not know the effective time of penicillin skin test. How long is the penicillin skin test effective? Here I will explain this issue in detail, hoping it will be helpful to everyone.

The penicillin skin test is mainly to prevent the occurrence of penicillin allergy. Once penicillin allergy occurs, it can be fatal if treatment is not timely. Therefore, for the safety of the patient, if penicillin is needed for intramuscular injection or intravenous infusion, a penicillin skin test is required. When performing a penicillin skin test, you first need to prepare the penicillin solution in a timely manner. Take 0.1ml of penicillin solution and add 0.9% sodium chloride solution to 1ml to make the penicillin skin test solution.

The penicillin skin test only requires injecting a small amount of penicillin under the skin, causing the skin to bulge, and then observing the skin's reaction. So how long is the penicillin skin test effective? Generally speaking, the effective time of penicillin skin test is twenty minutes. If the time is not enough, a positive result may not be seen. If the time is too long, it will also affect the judgment of the positive result. Therefore, when doing a penicillin skin test, you must master the twenty minutes time well. If there is no redness or swelling on the skin, the penicillin skin test is considered to be negative.

To sum up, how long is the penicillin skin test effective? It usually takes twenty minutes to check the results. The penicillin skin test is to ensure that the patient does not have an allergic reaction to penicillin while using penicillin. When doing a penicillin skin test, you need to prepare the penicillin skin test solution and then inject it directly under the skin. Wait for twenty minutes to observe the results. If there is no redness or swelling on the skin, it is considered negative. If there is redness or swelling, it is considered a positive skin test.