The cause of diabetic blisters is unknown, reports Healthline. Blisters seem to develop in diabetics who do not control their blood sugar levels, while the fungal infection candida albicans can put diabetics at increased risk of developing them. Improperly fitted shoes can also cause blisters.
The only treatment for diabetic blisters is to lower blood sugar levels, according to Healthline. The fluid in them is sterile, but, nevertheless, the blisters should not be punctured in case of infection; if they are excessively large, a doctor can drain them safely. Diabetic blisters usually heal on their own after two to five weeks and without scarring. To protect them, the blisters should be covered in a bandage with antibiotic or anti-itching cream.
Diabetic blisters are fairly rare, occurring in only 0.5 percent of diabetics, states Healthline. They are more likely to afflict men than women. They are commonly found on the feet, legs and toes, and they occasionally appear on the hands, arms and fingers. They usually occur in clusters and can be as big as 6 inches.
Diabetes can cause or exacerbate multiple skin conditions, reports Healthline. Diabetics must be vigilant about their skin and regularly inspect their feet for blisters and lesions. Socks should always be worn with shoes, which should be properly fitted and broken in slowly.