A foot ulcer is a wound or sore on your foot that occurs when an area of thickened skin is left untreated. It can also start by a shoe rubbing or a minor injury such as stepping on something sharp.
Conditions such as Diabetes can damage your blood supply or sensation to your feet and you are at risk of developing problems because you may not notice when they get injured.
Around 1 in 10 people with diabetes will develop a foot ulcer which is why it is important to get regular foot checks.