The grief of losing a spouse or partner affects not just emotional and mental health, but physical health as well. The surviving spouse or partner often develops health problems in the weeks and months that follow. A study published this week in JAMA Internal Medicine found that individuals who had lost a spouse or partner were more likely to have a heart attack or stroke within the next 30 days. Grief activates the sympathetic nervous system, which is responsible for revving up the body’s fight-or-flight response. That can lead to stress-induced changes in blood pressure, heart rate, and blood clotting. There is also a tendency after such a profound loss for the surviving spouse or partner to disregard his or her own health. It can take several months to a year to work through grief and grieving. If it lasts much longer, and is interfering with daily life—seeing friends, doing once-pleasurable activities—it’s possible that grief has morphed into something more serious, like depression.