Diabetes is a common disease affecting around 3.7 million people in the UK.
About 90 percent of all diabetes cases are caused by type 2 diabetes if the pancreas does not produce enough insulin or the body does not respond to insulin.
Common diabetes symptoms include cuts or wounds that take longer to heal than normal, blurred vision and extreme fatigue.
In bad breath, however, it can also lead to increased blood sugar levels.
Bad breath or halitosis could be linked to diabetes, warned the medical website Diabetes.co.uk.
It is caused by the addition of glucose in the saliva of the patient, which supplies food to bacteria in the mouth.
This can in itself lead to halitosis, but can also lead to dental plaque, it warned.
"Bad breath, better known as bad breath, is sometimes associated with diabetes," Diabetes.co.uk said.
"The causes of halitosis are far-reaching, but the condition is often associated with poor plaque removal.
"Plaque bacteria that live between the teeth and on the surface of the tongue digest glucose or food particles, releasing foul-smelling gases.
"In people with diabetes, high blood sugar levels increase the level of glucose in the saliva. This provides food for bacteria in the mouth and leads to the buildup of plaque.
"If plaque is not effectively removed, it can cause tooth decay and gum disease, which also causes bad breath."
Diabetic Patients In some cases, breathing could also smell like pear drops.
The smell is caused by a disease called diabetic ketoacidosis, in which the body burns fat instead of glucose when there is too little insulin in the blood.
Ketones are then formed as a waste product, which makes your breath smell like pear drops.
Diabetics could reduce the risk of halitosis by avoiding sugary foods and drinks and maintaining good oral hygiene.
If you are worried about the symptoms of type 2 diabetes, consult a family doctor, the NHS said.
Earlier diagnosis of the condition is critically important as diabetic patients are at risk for fatal complications, including heart disease.
Among the most vulnerable diabetics are people over 40, overweight people and those with an immediate family member with diabetes.
However, a healthy, balanced diet and regular exercise could lower the risk of Type 2 diabetes.