@lmcazares - Welcome to Mayo Clinic Connect!
I’m so sorry your daughter is so sick- she must be very scared. Here is a link to Mayo Clinic’s description of the illness:
https://www.mayoclinic.org/diseases-conditions/henoch-schonlein-purpura/symptoms-causes/syc-20354040
It is basically an inflammation of the small blood vessels- appearing as a skin rash -more on the legs and lower body-, in the intestines and at times in the kidneys.
As you see, it can cause severe abdominal pain- even small amounts of blood can be seen in the stool.
There can be blood in the urine too- either seen as just a pink hue or only microscopically.
HSP often follows a viral infection.
There is no specific treatment, mostly observation and follow up physical exams, blood and urine tests.
In very severe cases the patient is treated with prednisone.
Hydration is important of course.
What is the plan for your daughter now?

Hi @lmcazares, I'd like to add my welcome along with @astaingegerdm. You must be very worried about your daughter.

You'll notice that I moved your post about Henoch-Schonlein purpura (also known as IgA vasculitis) to this existing discussion
- Damage to legs from Henoch-Schonlein purpura? Stumped the doctors https://connect.mayoclinic.org/discussion/teenager-damage-to-legs-from-hsp-stumped-the-doctors/

I did this so you can connect with @jsimmons74 whose son also has HSP.

@lmcazares
So sorry to hear of your daughters diagnosis.

I am new to HSP. One thing that has helped me is to pack my burning, itching, painful legs and feet in body ice.