Symptoms: Pain on one side of the head or face, stiff neck, pain around the eyes, neck, shoulder, and arms, nausea, blurred vision, sensitivity to light and sound. The most common causes are as follows: 1. Various reasons can lead to a sensation of intense pressure in head when bending over, often accompanied with a headache as well. If you have to bend over and work,change your position.Position yourself on a chair and work without bending or leaning over. Avoid fatty and oily foods.They may give you a heavy head and a throbbing pain while you bend to do any activity. It could be a symptom of cold, neuropsychiatric problems or even disorders of the cardiovascular system. Headaches that involve pain in the back of the head can have a number of different causes. The Mayo Clinic says that these factors can be chemical activity in your brain, the nerves of blood vessels surrounding your skull, or the muscles at the back of the head and neck. Headaches can range from annoying to disruptive in severity. Close your eyes for a few seconds when you feel that your head spins after bending down. Sinus Headache Cervicogenic Headache. A headache when standing up or bending over/ down is a type of a headache that happens due to temporary high blood pressure that may occur by psychological condition or other causes, which may lead to intense pressure in head when bending over, so the doctor needs to measure the blood pressure for a long period of time. They can appear in any location on the head. 1 Also, some people are more prone to headaches than others. The pain in the back of your head occurs when one or a combination of factors affect your brain. Drink plenty of water and keep yourself hydrated. Intense Pressure and/or Pain in Head When Bending Over.