Neuroendocrine tumors don't always cause signs and symptoms at first. The symptoms you might experience depend on the location of your tumor and whether it produces excess hormones. In general, neuroendocrine tumor signs and symptoms might include:  Pain from a growing tumor A growing lump you can feel under the skin Feeling unusually tired Losing weight without trying  Neuroendocrine tumors that produce excess hormones (functional tumors) might cause:  Skin flushing Diarrhea Frequent urination Increased thirst Dizziness Shakiness Skin rash 
neuroendocrine tumors don't cause signs symptoms first  symptoms experience depend location tumor produces excess hormones  general  neuroendocrine tumor signs symptoms include:  pain growing tumor growing lump can feel skin feeling unusually tired losing weight trying  neuroendocrine tumors produce excess hormones (functional tumors) cause:  skin flushing diarrhea frequent urination increased thirst dizziness shakiness skin rash 
neuroendocrine tumors