Redness and itchiness are side effects of Minoxidil. See link
...the side effects of minoxidil can include scalp irritation, itchiness and dryness.
The more often you cut your hair, the quicker it grows back. Therefore, since we cut the hair on our head so often, it grows the fastest.
The Scalp is the area around the top of the head where your head hair typically grows. This excludes eye brow and facial hair that also grows on the head.
it grows from the scalp
It can in extreme cases. If you are male it might be male pattern baldness. Best thing to do is to go to your doctor to see why your scalp is itchy.
the hair grows out of a root which is inside your scalp.
Scalp hair grows faster than body hair, primarily because of the greater supply of protein brought to the follicles there. Some people have little body hair, and much of it tends to break off before growing very long.
It could very well be dandruff.
Human scalp hair normally grows at about 0.5 inches a month.
Does it feel hot or itchy? It may be because dying your hair will dry out your scalp. If that is your case try doing some deep conditioning such has coconut oil on your scalp.
The rate at which hair grows is determined by genetics, age, health, and hormones. Generally, the type of hair that grows the fastest is the hair on the scalp, followed by facial hair.
I have had a madly itchy scalp for the last 6 weeks and I am up to week 12 week of my pregnancy. I feel like pulling my hair out... I suggest get a pregnancy test quick!
Hair all grows at the same speed.