Is lymphedema related to hashimoto's thyroiditis, fibromyalgia, or compartment syndrome?

Compartment Syndrome: Compartment syndrome cause edema, which may compress the lymphatic drainage, leading to mild lymphedema. Hashimoto's thyroiditis or fibromyalgia does not cause lymph edema.

No relation: There is no relation although all of these problems can occur in the same patient.

Basic anatomy: Lymphedema is when there is a compromise of the lymphatic circulation. This third circulation (arteries, veins) carries things too thick to be safely carried in arteries and veins like bacteria eaten by white cells and digested food. It is propelled along by normal body movements but contains a thick material called lymph. Any blockage causes it to back up causing soft tissues/skin deformity.