HI, thanks for using healthcare magic
The most common causes for persistent coughing are
post nasal drip, gastroesophageal reflux and asthma.
There are other causes but these are the most common.
Some persons have a combination of different conditions.
Of these conditions, post nasal drip is most common of the three.
Allergies are the most common reason for post nasal drip and there are some persons who may be unaware of the drip itself.
Any chronic illness can cause fatigue
Treatment involves: (A) avoiding allergens if known
(b)the use of anti
histamine and decongestant eg
benadryl d, claritine d, allegra d
(c)
topical steroid nasal spray eg nasonex, nasocort, flonase, rhinocort
I hope this helps