Thanks for the question and concern. Erection problems may due to pathological situations or emotional disturbance. ED is sexually dysfunction characterized by the inability to develop or maintain erection of penis during intercourse. There are many reason for the cause of erectile difficulties like stress, injuries, psychological problems, or due to wide range of diseases. If you have the problem of ED for about more than a week it would be best to consult a doctor. As ED may result in many serious health issues like heart disease, diabetes, hypertension, or may be even more serious problems. There are various treatment available for ED like PDH5 inhibitors sildenafil, vardenafil, and tadalafil are prescription drugs which can be taken orally. Another treatment is injection therapy, one of the drug i.e. papaverine, phentolamine and prostaglandin are injected into penis.