You can rub safflower oil after spraining a tendon, because safflower oil has the function of activating blood circulation and relieving blood stasis, which can increase blood circulation, but it should not be applied in the acute stage. Acute stage injury, the local blood vessels will rupture, blood seepage, safflower oil and local rubbing rubbing will easily lead to increased bleeding, resulting in injury location swelling, pain, unfavorable activity symptoms aggravated. Rubbing safflower oil needs to be carried out 48h after the sprain, when the sprained blood vessels have basically closed, and can be used to expand blood vessels through safflower oil, improve the role of circulation, increase local blood stasis, as well as the metabolism and absorption of metabolic products, which helps to promote recovery and reduce symptoms. After the sprain, the injured position should be kept strictly relaxed and rested, preferably with a cast or brace for proper fixation to avoid further aggravation of the injury, and the injured position should be elevated above the level of the heart to promote the metabolism of blood stasis and inflammation through the effect of gravity, which can play a role in reducing symptoms and promoting healing.