i grew a full beard a couple years ago. it was great. not itchy at all, the issue of beard growing itchyness is a myth perpetuated by people who haven't grown more than a david charvet-esque, 5 o'clock shadow.
mine grew for 3 months without so much as a trim of the mustache. this became an issue after about 6 weeks as the hair on my upper lip got so long that it would get filled with food and drink.
after 3 months, i shaved it. the skin on my face had never been softer.
i miss my beard and will, one day, God willing, grow it back bigger and better than it was before.
thank you and good night.