A patient with an upper arm lump was recently treated, complaining of a hard and movable lump palpated in the anterior part of the upper arm. The recovery was satisfactory. The patient was a manual laborer, who usually did not pay attention to the condition of the upper arm, and did not notice that a lump appeared in the upper arm under the condition of line force, without obvious pain symptoms. Diagnosis: old biceps long head tendon rupture Treatment: For elderly patients, symptomatic treatment is sufficient, while younger patients require surgical treatment, the earlier the effect, the better.