not a chance in hell yet any of these could be a good possibility <| sep |> do you have a lot of stress ? How old are you ? Stress is much more likely to cause problems like you ' re having , than testosterone is . Lack of body hair could be due to age or genetics , and really isn ' t something that matters for testosterone levels . stress or anxiety disrupting sleep , can cause fatigue and brain fog is essentially just sleepiness IMO , disrupted sleep cycles would prevent morning wood AFAIK , prevent muscle gain somewhatyou build muscle at rest , not in the gym , no rest no gains and the anxiety could prevent erections properly . The only one that I don ' t think is too possible , is the loss of morning wood , that ' s a test used to determine physical vs mental ED , but I do see a way for poor sleep to prevent it . Also , I can hardly remember if I had wood or not every morning lol .