The Hub and Spigot are two types of fitting on either end of a pipe. At one end you have the Hub (Socket) fitting; which is a female end of a fitting designed to accept pipe or a SPIGOT connector. At the other end you have the Spigot fitting; which is a male end of a fitting designed to be used inside another fittings Socket (or Hub) end.
Most headaches are tension headaches. These headaches tend to happen again and again, especially if you are under stress. They are not usually a sign of something serious. But they can be very painful and hard to live with. Tension headaches can last from 30 minutes to 7 days. If you have a headache on 15 or more days each month over a 3-month period, you may have chronic tension headaches. This type of headache can lead to stress and depression, which in turn can lead to more headaches.
1 The most common short-acting chronic headaches are cluster headaches.  Long-duration headaches, which last more than 4 hours. Tension-type headaches are the most common type of long-duration chronic headaches and are, in fact, the most common type of chronic headaches in general.