I haven’t reversed my lymphoedema so I can’t answer that part but early lymphoedema can be turned around so while it’s hard in a packed day, try and keep up with exercises and massage. Elevation helps too. I have worn a compression sleeve for a long time. I have a good one, tailor made, and don’t live in an area of high humidity, so I have never found wearing it hot or uncomfortable. But the better the sleeve, the higher the cost it seems. In Victoria however you can get a significant rebate on a sleeve. I understand the wish to avoid one but warmer weather will only increase fluid retention. It’s the loss of lymph nodes in an axillary clearance that creates the problem. Good if you can turn it around, but with care lymphoedema can also be kept manageable and not disruptive. Best wishes.