As increase in appetite is one of the pre diabetic or diabetes
symptoms among other symptoms like increased urination,thirst. so its better to get your blood sugar tested for the same. Get fasting and postprandial blood sugar levels estimated. If there is increase in the levels then need to consult a diabetologist
for opinion and need to take care modify your life style like :
Regular walk and exercise
avoid sugars, alcohol.
Have balanced diet, with less of carbohydrates and lots of salads
Have a check on your weight.
If the values are normal then no worry.
hope this answer will help you.