Welcome to the forum.
It all depends on your illness and where your body has trouble regulating the salt.
To start, you have a dead layer of skin cells layering your entire body. This layer is thicker in some places (like your palms, soles of your feet) and thinner in others. This layer of dead skin cells is heavily keratinized. Keratin is a fiborous, insoluble protein that is not only found in your dead skin layer, but is the major component in your hair, nails and horns (if you have them
). The keratinized skin layer helps drastically reduce water intake and excretment and is one of the major evolutionary advances of vertabrates.
In freshwater, like in the water you bath in, the keratin-filled dead cell layer will imbibe water via capillary action. When this occurs, the cells will swell and take up a greater volume and surface area. It is the swelling that causes the wrinkling. However, in salt water, simple diffusion would occur and your skin will get tight due to the water in your dead cells diffusing into the salty water (via simple diffusion, not osmosis).
So is it safe for you to fish in salt water lakes, that all depends on illness on you. Do a little simulation, fill a lunch contained with salt water, dip you hand in their for 5 minute increments and describe how you feel. If you're able to endure this, you'll be fine. Moreover, don't fishermen use those Long-John rubber body suits?
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