Critical illness is designed to pay a lump sum or regular income upon diagnosis of a specified critical illness. Some of us may be diagnosed with a critical illness at some point in life, and would not want to have to worry about how we were going to meet the bills, or to cover any additional costs incurred as a result of the illness.
You can take out a critical illness policy which pays out if this was ever to happen to you. This being such a stressful time the last thing you want to worry about is money or getting back to work, so the cash lump sum will help ease the worry.
Some people would also use the lump sum to pay for the best treatment available for that condition helping them recover