On fundus exam, one sees flat, multifocal, grey-white lesions (100-200 micrometers), appearing to reach as deep as the RPE. Typically lesions are found outside the fovea in the posterior pole. A characteristic finding in MEWDS is an orange-yellow fovea with granularity.
One example of a moist heat therapy method that can work for your full body would be using a steam room. You could also use a hot tub as a way to treat your whole body. Not only can you find enjoyment and relaxation in using either of these options but they can help treat pain in all parts of your body.
The two examples of convection discussed here - heating water in a pot and heating air in a room - are examples of natural convection. The driving force of the circulation of fluid is natural - differences in density between two locations as the result of fluid being heated at some source.