Widening of the acromioclavicular joint space may have the following effects on life: localized pain in the shoulder and limitation of movement, and if this continues for a longer period of time, it may develop into a joint deformity. 1. Localized pain: For long-term widening of the acromioclavicular joint gap, it may cause a kind of chronic pain, which may cause localized pain in the acromioclavicular joint during shoulder joint activities, such as lifting or wrapping movements of the shoulder joint. 2. Restriction of activities: it may affect daily life and work, etc. It may cause localized pressure on the acromioclavicular joint to increase due to shoulder joint activities, resulting in aggravation of pain and restriction of activities. 3. Joint deformity: the widening of the acromioclavicular joint gap may cause some degree of abnormality in the local joint structure, such as degeneration, aging and hyperplasia of the acromioclavicular joint, and in severe cases, joint dislocation may also occur. Widening of the acromioclavicular joint space means that the local joint structure may be abnormal, and it is more likely to have increased joint range, joint capsule laxity, and degeneration of articular cartilage during daily activities, which may lead to joint deformity in severe cases. If there is any discomfort in the shoulder, it is recommended to consult a doctor in time to clarify the cause of the disease for targeted treatment under the guidance of a professional doctor.