sweating in back on top of lungs

[ridgerunner8]

i sweat on my back right over the top of my lungs and get weak is this a sign of oxygen desaturation or what

[National Jewish Health]

Sweating is not a sign of oxygen desaturation.  There are many causes of excessive and/or seemingly inappropriate sweating, many of which are benign; not an indication of a disease state.  Excessive sweating can be systemic, such as whole body sweating, or localized sweating, such as yours, or as another example sweating of just one side of one's face.  In the former group, of generalized increase in sweating are diseases such as diabetes, neurologic diseases such as Parkinson's disease and metabolic diseases such as tumors of the adrenal gland, called pheochromocytoma.  In the localized group are many neurologic diseases of the brain and tumors or other causes of compression of the spinal cord.

If your sweating really is localized to an area "over the top of" your lungs, you should see a neurologist to see if the cause of the sweating can be localized to a particular place in your nervous system.

Good luck.