When should you seek medical help first?
Call your GP or the GP out-of-hours service immediately if you develop a new swelling in your lower leg that feels warm and painful, or if you are breathing more rapidly and experience pain when breathing. Do not wait for oedema treatment. Also call your GP if you have a red arm or leg accompanied by a fever.
Swelling in your arm or leg can have various causes. It is not necessarily lymphoedema. You should first have any new or unexplained swelling assessed by your doctor.
In lymphoedema, fluid accumulates in the tissue because drainage via the lymph vessels is insufficient. It can be caused, for example, by:


