Arrhythmia or irregular heart beat includes tachyarrhythmia, where the heart beats faster, and bradyarrhythmias, where the heart beats slower than normal.
Male sexual dysfunction, also called erectile dysfunction or impotence, is characterised by a man not being able to get or maintain an erection for sex.
Migraine is a severe, recurring headache which may cause visual symptoms (aura). They affect 12% of people, most commonly women, who often have triggers.