Spotting daily is not normal. It could be due to many causes and the treatment depends on the cause.
There is always a way out. Hormonal imbalances can be managed through proper medication. Let your gynaecologist examine her, and if she finds any infection it can be treated immediately.
But it is important to also remember that if she is on any contraception, spotting initially is common and will eventually settle down.
There is nothing to worry about! The skin over the genitals can get darker. Causes like genetics and hormonal changes with age, any friction or inflammation are quite common. It is pretty normal. There is nothing much you can do but you can reduce the friction by wearing loose undergarments, using only cotton underwear and keeping the area dry.
Keep in mind that the vagina is the canal which leads to the uterine cavity and is covered by mucosa. If the darkening of the skin is sudden and associated with any changes in the vaginal discharge or any redness or soreness, it is advisable to meet your gynaecologist.
Your vagina has a natural odor and it is different for every woman. But if you feel the odor is strong and is associated with irritation, itching and foul-smelling discharge it could be an infection. Talk to your gynaecologist so that she can examine you to see if you need any help.
The vagina needs care and it is on us to ensure that we are getting proper hydration, a healthy diet, and practicing good hygiene measures.