Identify one risk factor for developing lymphedema after mastectomy.

The removal of multiple lymph nodes during a mastectomy is a significant risk factor for developing lymphedema. Lymphedema occurs when the lymphatic fluid fails to drain properly, leading to swelling, typically in the arms or legs. The lymphatic system relies on lymph nodes to filter and manage fluid balance in the body. When multiple nodes are removed, particularly from the axillary region, it can disrupt this fluid regulation and create a higher likelihood of fluid buildup in the affected limb.

While options such as increased physical activity, detailed follow-ups, and using properly fitted garments contribute positively to recovery and management, they do not inherently increase the risk of lymphedema. In fact, appropriate exercise and regular follow-ups can help reduce the risk and manage symptoms if lymphedema does develop, and fitted garments can provide support to prevent swelling. However, the surgical intervention itself, particularly the extent of lymph node removal, directly impacts the risk for developing lymphedema.