I do not know about the herb, Fearless, speaks of, yet, have your friend get a rebounder or even a jump rope. Use it daily. If able, begin at 5 minutes a day and work his/her way up. Also, lymph massages are great! LOL Although, truth to be told, first time I had it, I thought this is not doing anything! It is sooo light, the lymph is not deep into the tissue but just beneath the surface of skin. That is reason the massage is 'feathery' (for lack of better word).
These are a few things that your friend can begin with. Good luck.