Hi me 77 now i am alone my wife no more i have a...

how to treat BPH and erectile dysfunction and low ejaculate size

BPH can be treated according to the severity of the problem so in mild cases it can be treated by drugs like prazosin and in severe cases it can be treated surgically or by transurethral resection of the prostate and to treat erectile dysfunction then you can use drugs like tadalafil or sildenafil  and low ejaculate size can be due to the drugs used to treat BPH which cause retrograde ejaculation and to solve this problem the you should has the dose of the drugs for the BPH adjusted by the physician

How to diagnose BPH and erectile dysfunction and low ejaculate size 

you should be assessed by the urologist and has serum testosterone level done to exclude the presence of low testosterone level which may cause the symptoms you have abd you should assess the severity of BPH assessed by ultrasonography

Waht are the causes of and erectile dysfunction

atherosclerosis
low testosterone level
anxiety

advice

you should be assessed by the physician and has the lab test done and provided by the treatment by the physician