What causes diffuse mottling of the bottom of my hands? it has the net-like pattern. looks like ground-beef. it doesn't look like pics of raynaud's.

Have it cked by dr.: It's best to have your hands checked by your doctor, so s/he can make a decision on whether to refer you to a dermatologist or s/he can answer your question quickly. The description you're describing needs to be documented in your chart, possibly with pictures taken, and a timeline of when this started, and where you are now. Depending on your medical history, travel history, exposure to environmental toxins, may shed more light on to your situation.