The time and steps for a temporary medical order for a skin test are as follows:

1. The doctor or nurse should decide whether a skin test is needed based on the patient's condition and treatment needs, and fill in the relevant medical orders.

2. When filling in the doctor's order, the specific time and method of the skin test should be indicated, as well as the criteria for determining the skin test results. And sign your name, professional title, department, date and other information on the medical order.

3. After signing, the medical order should be promptly sent to the pharmacy or head nurse for review to ensure the rationality and accuracy of the medical order.

4. When performing a skin test, the nurse should operate in accordance with the doctor's instructions, record the skin test results and the patient's reaction, and report them to the doctor or head nurse in a timely manner.