Penile medication precautions mainly include good preparation, pay attention to the amount of medication, pay attention to the observation of adverse reactions and so on. 1. Preparation before medication: the penis is a private part, before medication should determine the site of medication, and then wash the site of medication, pay attention to local hygiene. 2. Pay attention to the amount of medication: on the one hand, some children are also prone to penile diseases, such as prepuce and glans, etc., according to the age of the child to decide the amount of medication; on the other hand, the penis glans skin sensitivity, according to the stimulation of the drug to choose the appropriate amount, some drugs need to be diluted and used, such as the use of permanganate of potassium topical immersion in the medication, diluted times should be used for other skin than the high number of. 3. Observe the adverse reaction: after using the medicine, observe whether there is any redness, swelling, rash and other adverse reactions in the place where the medicine is applied, and also whether there is any systemic or other systemic adverse reaction, such as fever, nausea and vomiting, etc. Specific precautions should be taken before use. Specific precautions should be carefully consulted with the physician before use of the drug, follow the doctor’s instructions to use the drug.