This is Dr Basu, Experienced Specialist.
I am here to address your concerns and provide great service.
I am sorry to hear that.
From excessive toilet paper rubbing yoo developed severe irritation.
So first thing, you need to use a intense moisturizer.
You can use Eucerine moisturizer.
Oatmeal bath is another nice home remedy to cool things down
Cucumber pieces and ice also help to stop burning.
Coconut oil also helps with its sotohing action.
6 hour long diarrhea sounds like food poisoning or a viral
Imodium should help.
The dose i 2 tablets every 4 hours till diarrhea stops.
Drink plenty of gatorade as well.
If you develop fever, or see blood in stool or develop severe abdominal pain, then antibiotics will be needed for probably bacterial infection.
Thank you for sharing your concerns with us today. If you have any additional questions or need further clarifications, please do not hesitate to ask. I am here to answer them. I wish you good health. Regards, ***** *****