There are many reasons for person to have a constant urge to clear the throat. The most common ones are a feeling of dryness in the throat if there is less water intake or if there is more usage of water or more loss of water from the body like in or excessive sweating when you work out or when you work outside in the sun, excessive talking shouting, singing all these things again will dry up the body. Working in AC or being in cold conditions again will sap the body of water which is not very visible, like in case of sweating you know you visibly lose water, but in case of ac or in colder climate you don't realise you are losing water this leads to a little bit of pricking sensation in the throat and then you have to clear your throat constantly. The Other common thing is post nasal drip which means there is a flow of mucus arising from probably from the nose and sinuses constantly flowing in the back of the nose which gives an uncomfortable feeling and the person tends to hack or clear throat because of that you just get rid of that sensation. Sometimes Acid Reflux the digestive acid from the stomach starts coming up for some reason during acidity or such conditions and it gently burns the skin on the throat, this leads again the burning leads to a little bit of irritation and the sensation to clear the throat. Allergies like dust allergy, wheezing kind of thing again by direct contact of dust will irritate the throat and make you clear the throat regularly. Some people do that has a habitual thing maybe by observing somebody else picking up a bad habit or they would have started when they had a bad throat infection and there was a lot of mucus to clear and they started within the never stop doing that and that, there can be some small deposits, dry concretions in the backside of the tongue or sometimes in the tonsils which will irritate the throat, there can be prominence of the tonsil like structures in the back of the tongue which can again tent to clear thr throat. Chronic condition in throat can happen if a person smokes regularly or exposed to improved Chemicals on a day to day basis then again irritation starts, there can be a little bit of irritation during or after the throat infection. There are some patients who have a psychological fear phobia of having something in the throat and they have the feeling that they have some small problem in the throat and just to see if everything is alright with clearing throat or try swallow and these is kind of habit pick up because of psychological feeling.
