it is disease that when  i go   to  toilet and  after  urin comes out sperm.if  it  is  disease then  which disease. and  also  one thing  more i  have  alergy from  six years.when  i draw some  line  on my  skin then  after  aftr  5  mints red  strips  like  artery  comes  out, and after  15  mints  then  become  normal.
Hello Thank you for trusting Chat Doctor The basic cause of semen leakage is the overstimulated functioning of the parasympathetic nerves. The parasympathetic nerves aid in keeping the ejaculation valve closed, thereby helping a man to maintain his erection during sexual performance. But over stimulation weakens the nerves, and they can no longer keep the valve tightly shut. Consequently, semen leaks out. You also have dermatographia it may be due to emotional stress and infection. Please consult your doctor he will advise correct treatment after investigations.