Who counts as a creditor?
Anyone you owe at a given moment. Trade creditors are suppliers whose invoices you have received but not paid. Other creditors include HMRC for VAT, PAYE and corporation tax accrued but not yet due, credit card balances, loans, and a director who has lent the company money.
The balance sheet splits them by when they fall due. Creditors due within one year are current liabilities and sit against your current assets to show whether you can meet what is coming. Anything due later, such as the long end of a loan, is shown separately.
Creditors are not a sign of trouble. Buying on 30-day terms is normal, and the balance simply reflects it. The problem is not knowing the figure, because then the bank balance looks like money you can spend when much of it is already spoken for.