When the arm is bent and the tendon feels painful and uncomfortable, it may be a local tendon strain or a local inflammatory irritation. Observe whether there is local redness and swelling, which can help to determine the condition. Timely to the orthopedic department to see a doctor, combined with physical examination of the initial judgment. If it is caused by inflammation, you can choose magnesium sulfate topical, with anti-inflammatory and pain-relieving effect, in addition is with cephalosporin and other, antibiotic treatment. If it is a local tendon strain, usually choose local medicine, and physiotherapy is the main, local can use flurbiprofen Babu cream to relieve pain, and then spray some blood circulation drugs, such as Yunnan Baiyao aerosol. Pay attention to rest, avoiding arm force, and repeated flexion and extension, which can help relieve pain.