My 7 year old has blood coming from her anal while pooping, is there a concern with this?

YES.: Yes, you should be concerned, but, unless she has pain or other worrisome symptoms, stay calm. Anal fissures are common @ this age, especially in kids whose poop is hard or bulky. A topical antibiotic/steroid combo along with preventing constipation will allow it to heal. Never the less, the diagnosis requires an actual physical exam. Make an appointment with her pediatrician.

Evaluate please: The most common cause for rectal bleeds is rectal fissure. Any associated chronic symptoms, weight loss, diarrhoea, loss of appetite, may suggest bigger problems. Constipation is often associated with blood in stools. So as you see there are many causes for this, just to name a few.