My boyfriend has been feeling dizzy and getting headaches over long periods of time. It comes and goes but it started in late 2016. It seems to have worsened lately and he’s been experiencing these symptoms every day. A new addition to the issue is that he has been feeling a tingling/numb sensation in his limbs. I’m not sure if this is related but he has also been feeling a lower back ache (though he’s feeling better in that regard). Nobody can tell him what’s wrong. Please help.