What Causes Numbness In Hands And A Lump On The Forehead?

Hello, my name is claire. I have a few symptoms that I would like it advice or help with today. I have numbness in my hands every day which comes on when I lie down and put my arms by my side. It comes from my elbow and my left side is worse than the right. Today I have had a burning sensation in my palms again it the left side that is worse. I get a sore head a lot and have problems with my toilet habits to. I am frequently urinating and constantly go from diarrhoea to constipation. I have also got a lump on the top right hand side of my forehead which I have had for ages but is getting bigger and causing me pain and discomfort. I don't know if all these symptoms are linked but would really like your thoughts. Thank you