Welcome in H.C.M. for Choosing regarding your medical query.
After reading about your medical problems of diabetes, hypertension
and herniated disc
you had recently developed excessive dryness in nose and palpitation
For dryness in nose you may be having any local pathology like DNS, hypertrophied turbinates but these possibilities wil be confirmed only after examination. In the meantime you may put liquid paraffin
or glycerin to moist the nose. You may also put nasal saline drops for this purpose.
Regarding palpitation you may add anti anxiety to your medication with the consent of your treating doctor.