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11 Major Side Effects Of Eating Too Many Watermelons

Watermelon is a delicious fruit that grows on the tree of the same name, and belongs to Cucurbitaceae family, and relates with cucumber, squash, pumpkin etc.  Watermelon is unique in the sense that it is considered both as a fruit and as a vegetable. It is a fruit as it grows from the seed, and at the same time, they are considered as a vegetable because they are harvested from the field just like a vegetable. Consuming watermelon is very beneficial for  us as it provides a lot of health and beauty benefits because of the presence of vitamins,minerals, antioxidants, dietary fibers and other compounds present in it. Although watermelon provides a lot of health and beauty benefits but it is important to eat watermelon in moderate quantity as there are some side effects of eating too many watermelons. In this article, we will know about these side effects in detail.


Side Effects Of Eating Too Many Watermelons

Side Effects Of Eating Too Many Watermelons


(1) Can Cause Intestinal Disturbances Like Bloating, Indigestion Etc.

Watermelon is a good source of lycopene, which is a carotenoid phytonutrient that reduces the risk of development of several types of cancer, provides anti-inflammatory benefits and also keep our bones stronger. In spite of having all these benefits, it can be dangerous for us when consumed in large quantity. Too much of lycopene may lead to  digestive problems like nausea, bloating, diarrhea, vomiting, indigestion,  and gas.

Because of this reason, it is advisable to not to eat too much watermelon and this becomes even more important for older people as their digestive system get weaken with age.


(2) Can Cause Cardiovascular Problems

Watermelon is a good source of potassium which is a vital nutrient that plays many important roles in keeping us healthy. It makes our bones and muscles stronger, maintains electrolyte balance, keep our heart healthy, regulates blood pressure, regulates metabolism and performs many other functions (source).  Potassium is good for our health but only when it is consumed in limited quantity.

Too much of potassium can lead to cardiovascular problems like weak pulse, irregular heartbeats, cardiac arrest etc. It may also affect the function of the nervous system of our body. As Watermelon is a good source of potassium and 100 grams of watermelon can provide around 112 mg of potassium so it becomes important for us to keep a watch on the intake of this refreshing fruit.


(3) Not So Good For Diabetics

Watermelon is both good and bad for the people suffering from diabetes. It is good in the sense that glycemic load of watermelon is 3.6 which is low and this means eating watermelon don’t cause a sudden spike in the blood glucose level of a person. However, the glycemic index of watermelon is 72 which is very high and is not considered good for the people suffering from diabetes.

Watermelon is a good source of natural sugar which may increase the blood sugar level of a person. However, at the same time, watermelon is also a good source of dietary fiber which helps in controlling blood sugar. So, if you are suffering from diabetes then it is better to first consult with your doctor about the watermelon consumption and eat it as per the advice of the doctor.


(4) Not Suitable For People Suffering From Low Blood Pressure

Watermelon is very effective for keeping blood pressure level under control and for providing relief high blood pressure, and thus reduces the risk of hypertension and associated health problem. As high blood pressure may even increase the risk of various cardiovascular problems like heart attack and heart stroke. So, it means by regulating high blood pressure watermelon also prevents us from the risk of cardiovascular problems.

However, over consumption of watermelon is bad as it may reduce our blood pressure level to such a low level that it may cause hypotension and may give rise to lightheadedness, dizziness, fainting,kidney failure etc.  (source)

As watermelon lowers our blood pressure so they are not at all suitable for the people suffering from low blood pressure ( as eating watermelon will worsen their condition) and even those who are taking medication for high blood pressure should be cautious of eating watermelon as watermelon may interfere  with the medications used to control high blood pressure.

So, if you are suffering from high blood pressure then you should first consult with your doctor about the consumption of watermelon and eat it only as per his/her recommendation.

Suggested Read-18 Major Health Benefits of Watermelon


(5) Can Cause Allergic Reactions In Some Individuals

Watermelon is a refreshing fruit that provides a lot of health benefits but there are some individuals who can’t enjoy the deliciousness of this juicy fruit and its health benefits because of the allergic reactions associated with it. Some people are allergic to watermelon and they should avoid watermelon in all circumstances. These allergic reactions can range from being mild to being severe.

Some of the common allergic reactions caused by watermelon are mild rashes, anaphylaxis, facial swelling etc. It is important to note that individuals who are allergic to carrots, latex and cucumber are more likely to develop allergic reactions to watermelon.


(6) Not Suitable For Pregnant Women

Although watermelon is a good source of a number of vitamins,minerals, and other compounds but still it is not so healthy for pregnant women and pregnant women should avoid eating watermelons. This is because consuming watermelon in large quantities may give rise to gestational diabetes, because of the natural sugar present in watermelon. Gestational Diabetes is a common but a serious health issue that may affect the pregnant women.


(7) May Rise Digestive Problems Like Loose stools, Gas, Flatulence Etc.

Watermelon is an excellent source of water ( around 92 percent) and a good source of dietary fiber ( around 0.4 gram per 100 grams), and the presence of both these compounds in watermelon make it very beneficial for providing relief from constipation and other digestive problem. Watermelon regulates bowel movement and ensures that waste gets excreted out of the body smoothly.

However, consuming watermelon in high quantity is bad as it may give rise to various digestive problems like bloating, flatulence, gas etc. (source)

Watermelon also contains sorbitol, which is a sugar that may give rise to loose stools and gas problems to the individuals who are intolerant to loose stools.


(8) Can Cause Nerve And Kidney Problems

Watermelon is very beneficial for our nervous system, muscles and even for the kidneys because of the essential vitamins and minerals present in it. However,it is important for us to make sure that we are getting these nutrients in the right quantity. Lack of these nutrients or having too much of these nutrients, both are bad. Consuming watermelon in large quantity may give rise to nerve problems, muscle problems, kidney problems etc.

Suggested Read-12 Wonderful Beauty Benefits of Watermelon


(9) Arginine Side Effects

Watermelon contains arginine which is an amino acid that plays an important role in improving the sexual health of a person by curing erectile dysfunction. It is also effective for providing relief from chest pain, controlling high blood pressure, prevents inflammation etc.. However, too much of arginine is bad and there are some side effects like abdominal pain, bloating, diarrhea, gout, allergies, worsening of asthma etc. (source). To avoid the risk of these side effects, it is better to eat watermelon in moderate quantity.


(10) May Cause Overhydration

Watermelon is an excellent source of water and around 92 percent of its weight is just water. Water plays an important role in keeping us healthy as it is required by our body for almost every cellular activity. Our body is made up of 60 percent water and most of the vital organs of our body are majorly filled with water. Lack of water in our body can cause dehydration and other serious problems. It is important for us to make sure that our body is properly hydrated and watermelon helps in doing the same. However, just like every other thing too much of water is bad for our health.

Consuming watermelon in large quantity may increase the water quantity in our body. If this excess water is not excreted out of the body then it can lead to increase in the volume of our blood and may cause swelling of legs and can even lead to exhaustion and fatigue in individuals with weak kidneys. Too much of water is bad even for the individuals with healthy kidneys as it will put pressure on our kidneys and we will also lose important salts and minerals from our body.


(11) Not Suitable For People Suffering From Hyperkalemia

Watermelon is a good source of potassium which is a vital nutrient that plays an important role in keeping us healthy as it regulates the blood pressure, reduces the risk of kidney disorders, maintains electrolyte balance, regulates metabolism and provides many other benefits. However, too much of potassium is bad and those who are diagnosed with hyperkalemia should avoid eating food high in potassium.

Hyperkalemia is a condition in which higher than normal level of potassium flows into our bloodstream and is associated with kidney failure). Hyperkalemia can give rise to cardiovascular problems like irregular heartbeats, weak pulse, cardiac arrest etc. and can adversely affect our nerve health. On an average, one large wedge of watermelon provides around 641 mg of potassium (source) which is too much for the people suffering from kidney problems.








The information contained in the post is for general purpose only and shouldn’t be considered as a medical advice or as an alternative to medical advice. Although I’ve tried my best to keep the information contained in this post as accurate and updated as possible, but I make no guarantee of the accurateness of the same.

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About Bharat Sharma

Bharat Sharma is a simple guy who lives in Delhi,India and loves writing about the health and beauty benefits of the common food item we see in our kitchen and refrigerator.

Comments (1)

  • Most of reasons that are mentioned in the post are not a side effects, They are just caution for patients, who are suffering from respective disease. I don’t feel Watermelons are harmful for the health but I agree excess may cause loose motion for sure 😀 . Watermelons are rich in electrolytes and water content. Watermelons are very low in calories, so you do not need worry much about weight gain. 😀
    Over all They are Best 🙂

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