Harvard Health Blog

Inflammation can be a beneficial sign that the body’s immune system is fighting an infection, but it can also linger over time, damaging the body. There is evidence that eating a diet heavy in foods that promote inflammation can increase the risk for certain health problems, and also that a healthy diet can reduce inflammation.

Inflammatory bowel disease (IBD) is a treatable condition once considered a disease that largely affects people who are white, although in recent years it has been diagnosed more often in other racial and ethnic groups, in the US and around the world. Recognizing this condition early can make a difference in care and quality of life.

Millions of people around the world have sickle cell disease, a genetic condition that can cause pain and damage to organs or tissues, and can make children more susceptible to other health problems. In the US, most cases are diagnosed through screening in newborns. Getting connected to the proper care early in a child’s life can help prevent complications from the disease.

Every day, more and more adults are getting vaccinated against COVID-19, helping us build toward herd immunity. But what about children and teens? What is the status of research on the vaccines in these groups, and when might vaccines be available for them?

After too much time spent indoors (and probably less active than is healthy), getting outside and taking a hike is a great way to get some exercise while enjoying nature. But before you hit the trail, make sure you’re well prepared.

Although it has been known for some time that individuals with dementia frequently have poor, fragmented sleep, two new studies suggest that if you don’t get enough sleep in midlife, you are at increased risk for dementia later in life.

A history of discrimination in multiple settings, including health care, may make some people who identify as LGBTQ+ hesitant to get a COVID-19 vaccine, even though the virus has disproportionately harmed this community. If you're struggling to make a decision, this may help you consider benefits and risks.

Polycystic ovary syndrome is the most common cause of infertility in women. In many cases, women with PCOS have skin and hair issues such as acne, hair loss, or excessive hair growth in places where they normally do not have hair. Treatment options vary depending on the symptoms and each woman’s preferences.

Obstructive sleep apnea leaves people tired, but also puts them at risk for other health problems. Not everyone with sleep apnea can use an airway pressure machine, and some may simply prefer not to. There are oral appliances available, but are they effective?

No one likes being stuck by a needle, and it’s not unusual for a person to be afraid of needles. If it’s serious enough, this phobia can affect quality of life and overall health — an especially important concern with vaccination available for COVID-19. But there are ways to cope with the problem.

The COVID-19 pandemic helped lower life expectancy among all individuals in the US, and this impact has been worse in communities of color. Longstanding systemic failings lead to worse quality of life and poorer health in these communities, but we can all take steps to improve this situation.

As more states have legalized the use of marijuana and products derived from it, more children are being exposed. Children can’t be trusted not to eat appealing-looking food items they may find, so it’s up to adults to take precautions and make sure edibles are stored where children can’t find them.

The key factor causing climate change is greenhouse gas emissions, and the health care industry plays a significant role, with drugs and chemicals being the biggest contributor. While the benefits of medications to the world can’t be overstated, here’s how to balance the need for them with concern for the environment.

A healthy microbiome — the genes of tiny organisms living in the digestive tract — helps protect its human host from chronic diseases. Researchers do not yet fully understand the connection, but it appears that eating unprocessed plant-based foods allows the gut microbiome to thrive.

While eye problems can affect people of any age, some conditions become more common after age 40. Some are normal, or at least expected; others are of greater concern and will require treatment. Here’s how to keep your eyes healthy and address certain problems.

Antidepressant medications are frequently prescribed for chronic pain, particularly neck or low back pain and certain types of arthritis — though other treatments are usually tried first. An analysis of past research considered how effective antidepressants are for these types of pain, but the results are not encouraging.

Advances in breast cancer research have led to more personalized treatments, based on subtyping and more sophisticated testing. A risk assessment test can predict that some women do not need chemotherapy but will benefit from hormone therapy, and who might benefit more from both treatments.

In addition to everything else associated with stress, it can have negative effects on the skin, and can also aggravate certain skin conditions. But skin and hair also produce stress-inducing signals that can travel back to the brain, adding to psychological stress and perpetuating a stress cycle.

If you have upset someone, the best way to rectify the situation is by making a sincere, heartfelt apology. But just saying the words isn’t quite enough: for an apology to be effective, it has to be genuine. You have to mean it, and you have to make that clear.

Myasthenia gravis (MG) is a rare neuromuscular disease that impairs the transmission of nerve signals to muscles, causing temporary weakness of affected muscles. While treatment is complex, recently updated guidelines have added to the understanding of MG and are improving approaches to treatment.