My daughters foot lost a large area of skin in an accident 6 days ago. used ciprofloxacin for 1 day and zinnat for 3, but is red around. what to do?

Needs re-examination: "large area of skin" with persistent redness may indicate infection. She should be examined to determine if she needs further medication to avoid cellulitis.

Red = infection: Until proven otherwise by dr's examination. She needs to be seen asap, as the antibiotic she is on might not be effective in her case, or there could be inflammatory issues, but infection most likely with traumatic skin avulsion. See her dr / urgent care / er dr asap.