This can be confusing because some of symptoms can be the same. However there are vast differences between the two.
Lactose Intolerance is when the body has difficulty digesting the lactose sugar found in milk, leading to tummy discomfort or bloating but is not life-threatening. The amount of discomfort a person with lactose intolerance experiences varies from person to person.
A dairy allergy is when the body’s immune system reacts to milk proteins causing symptoms that range from mild (e.g. rashes or hives) to severe (e.g. trouble breathing and loss of consciousness). A dairy allergy can be life threatening.
It is best to talk with your doctor for personalized assistance around this topic.