Although the kiwi has many benefits, you can never be too careful as your body may react negatively to the overconsumption of Kiwis. There have been many cases of mouth irritation and rashes among teenagers especially.
This may be due to the very sour taste of kiwis. Although many people prefer that taste, there is an equally large group of people that cannot bear eating something sour like kiwi. Other symptoms may include a swollen tongue, vomiting and in extreme cases, hives. If you have trouble swallowing, it is also a sign that kiwi is not the best fruit for you.