You can use safflower oil after a sprain, but the time to use it should be correct, such as within 24 hours of the sprain, or in the swelling period is not suitable for the use of safflower oil. 24 hours or the swelling period is serious, you can instruct the patient to brake for cold compress treatment, or give external blood-stasis ointment for symptomatic treatment, wait for the swelling to reduce the use of safflower oil. When using safflower oil in rubbing, use gentle techniques, do not use violence or excessive force, so as not to aggravate the subcutaneous soft tissue damage, aggravate the bleeding, it is best to use under the guidance of a doctor to avoid accidents. If the patient is allergic to safflower oil, it should be prohibited to avoid allergic reactions, such as the appearance of paresthesia.