17 Lactose Intolerance Symptoms and Signs: What You Need to Know

Introduction: Understanding Lactose Intolerance

Lactose intolerance is a widespread digestive issue that affects a significant portion of the global population. It occurs when the body lacks sufficient lactase, an enzyme responsible for breaking down lactose, a sugar found in dairy products. Without enough lactase, lactose cannot be properly digested and absorbed, leading to various symptoms and discomfort. In this article, we will delve into the top 17 lactose intolerance symptoms and signs, helping you recognize if you or someone you know may be affected by this condition.


Before we get to the symptoms, it’s essential to differentiate lactose intolerance from a milk allergy. While both conditions involve dairy, lactose intolerance is a digestive problem, whereas a milk allergy is an immune system reaction to proteins in milk. The symptoms of these two conditions can overlap, but they are distinct and require different treatment approaches.

Now that we’ve clarified the difference between lactose intolerance and milk allergy, let’s explore the factors that contribute to lactose intolerance. The primary cause is a deficiency in lactase production, which can be due to genetic factors, aging, or other health conditions. Additionally, some individuals may temporarily experience lactose intolerance after a gastrointestinal illness or surgery, but their lactase production usually returns to normal over time.

It’s also worth noting that lactose intolerance can manifest differently from one person to another. Some people may have mild symptoms, while others may experience severe discomfort after consuming even small amounts of lactose.

Furthermore, the severity of symptoms can vary depending on the amount of lactose consumed and an individual’s lactase production levels. With this background information in mind, let’s dive into the 17 lactose intolerance symptoms and signs you need to be aware of.

1. Bloating – The Uncomfortable Swelling

Bloating – The Uncomfortable Swelling


Bloating is a prevalent symptom of lactose intolerance, experienced by many individuals who struggle with digesting lactose. When lactose is not broken down and absorbed properly, it can ferment in the large intestine, producing gas as a byproduct. This excess gas accumulates in the stomach and intestines, causing a swollen, tight feeling that can be uncomfortable and even painful.

The severity of bloating varies among lactose-intolerant individuals. Some may experience only mild discomfort, while others can have significant bloating that affects their daily activities. The intensity of bloating also depends on the amount of lactose consumed, with larger quantities typically causing more severe bloating.

To reduce bloating associated with lactose intolerance, individuals can try consuming smaller amounts of lactose-containing foods or opting for lactose-free alternatives. Over-the-counter lactase supplements can also be helpful for some people, as they provide the necessary enzyme to break down lactose and alleviate bloating.

It is important to note that bloating can be a symptom of other digestive disorders, such as irritable bowel syndrome (IBS) or celiac disease. If you experience persistent bloating even after eliminating lactose from your diet, it is recommended to consult a healthcare professional for further evaluation and diagnosis. (1)

More on LQ Health:
Popular Articles