Why do cupcakes always tend to get sickly when you eat to many of them? I am asking this because when I eat too many cupcakes with loads of icing I feel sick

To much sugar, gluten, wheat... Etc

If you have too much of anything it will become bad (everything in moderation) but you'll get sicker with cupcakes and what not because we don't need much sugar so basically it's SUGAR OVERLOAD

Too much sugar and stuff like that being ingested into your body at the same time.
If you feel full stop eating, you'd rather feel full than sick. ;)

Eat one cupcakes, and I feel sick and throw up, I hate cupcakes and no cupcakes are good

Frosting lowers your cardiovascular health by increasing the level of LDL (i.e. ‘bad’) cholesterol in your body and decreasing your levels of HDL (i.e. ‘good’) cholesterol.

In addition, they encourage your body to store fat, particularly around your abdomen.

There is also some evidence that regular consumption of trans fats is linked to an increased likelihood of developing type 2 diabetes.

Finally, the amount of sugar in frosting is enough to spike your blood sugar way past See More healthy limits, providing you with empty calories that make it difficult to lose weight or to maintain a healthy figure.

No matter how much you might enjoy the taste of frosting, the cons of consuming it clearly outweigh the pros.