Red flag symptoms - Erectile dysfunction Dr Tillmann Jacobi examines the the possible red flag symptoms to consider when a patient presents with ED. by Dr Tillmann Jacobi Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up