I am 42 years old and i have lot of cough during sleeping
If you have a lot of coughs during sleep, then you can try to humidify your room. A cool mist vaporizer would be an ideal one. Your throat could be also dry causing that. You can see a doctor for more help.
your sick...a cold?
Change your pillow's once a year do not use fabric softner on sheeting or pjs.Be checked by your doctor if you are using more than one head pillow.