A swollen shoulder may be caused by a sebaceous cyst, or it may be caused by lipoma and subcutaneous hematoma.
1. Sebaceous cysts: when the exit of sebaceous glands in the shoulder area is blocked due to various reasons, there may be accumulation of sebum in the shoulder area, which may form a round or oval lump over time, with a black head usually attached in the center, i.e., sebaceous cyst. When infection occurs, there may be redness, swelling and pain in the localized lump.
2. Lipoma: There is thick adipose tissue attached under the skin of shoulder area, and when the subcutaneous adipose tissue undergoes degeneration or abnormal proliferation due to various reasons, it may cause accumulation of subcutaneous fat in the shoulder area, which may also lead to the symptom of bulging at the shoulder. Lipoma is relatively soft in texture, good in mobility, rarely infected, but may have compression symptoms.
3. Subcutaneous hematoma: Because of trauma or violence and sports, there can be traumatic subcutaneous bleeding in the shoulder area, and form a subcutaneous hematoma, which can bulge a piece of bag. There are symptoms such as purple skin color and swelling and pain.
There may be other reasons for the swelling of the shoulder, such as bone and soft tissue tumors at the shoulder and fractures and other diseases. It is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.