Constant pressure imbalance in the ear is not a normal sign or even an anomaly. It is probably the sign of some kind of inflammation in your sinuses or some kind of a disease of the upper respiratory tract that is causing mucus to block the pressure equalization between the outside air and the middle ear.
The process of pressure equalization is performed by the Eustachian tubes of the ear. This is a tube that connects the middle ear to the nasopharynx – an area at the back of the nose. This tube is normally shut but will open every now and then with the motion of chewing and, in some people, by voluntary action. This tube also serves the purpose of draining out any mucus accumulation in the middle ear but sometimes, due to a respiratory tract infection, this mucus can get stuck in the Eustachian tube. Once this happens, bacteria move in and an ear infection begins. A swelling of the ear that occurs due to an infection is called an inflammation – can be countered by the use of a decongestant or an antihistamine.
If there is no infection or nasal congestion that you face then you can use some simple techniques to counter the effects of high ear pressure. You might need to do these often if you have had this problem for a while. One technique is to drop your jaw. In this technique instead of opening your jaw front-first, try “dislodging” it by dropping your entire lower jaw. This will pull open the Eustachian tube just enough to let fresh air in. If this technique is not effective, then close your nostrils with your fingers and blow as you would to blow your nose. You will immediately feel a rush of air and your audibility reduce for a second if the pressure you are infusing is higher than the atmospheric pressure, but this can be corrected again by sucking the air back down and you can even fine tune the pressure with a bit of practice. You might have noticed this very same effect if you have tried to suppress a sneeze at times. It is also a good practice to chew some gum when you are in a situation where you will need to face changing pressures – like in the inside of a pressurized aircraft cabin. This has the same effect of a jaw drop described earlier.