( CNN ) -- Mumford & Sons bassist Ted Dwane received emergency treatment this week after doctors found that he had a blood clot on the surface of his brain . The Grammy-winning group postponed several shows , saying Dwane sought treatment after `` feeling unwell for a few days . '' The clot required an operation . `` Ted is receiving excellent care and we are being assured that he will recover quickly from surgery , '' the group said on its website . In December , then-Secretary of State Hillary Clinton was also hospitalized for a blood clot that formed after she fell and suffered a concussion . Clinton 's clot was in the vein in the space between the brain and the skull behind her right ear , officials said . While little is known about Dwane 's clot and its location , Dr. Mary Cushman , director of the Thrombosis and Hemostasis Program at the University of Vermont and chairwoman of the American Society of Hematology 's subcommittee on quality of care , said in December that Clinton 's type of clot was called a cerebral venous thrombosis and is relatively rare . A two-year study conducted in the Netherlands found that cerebral venous thrombosis affects approximately 1 in every 100,000 people . In comparison , the Centers for Disease Control and Prevention says 1 in 1,000 people are affected by deep-vein thrombosis , a similar clot found most often in the leg . Clinton had a DVT in 1998 . `` There are a handful of genetic conditions that predispose someone to these kinds of clots , '' Cushman said . `` That 's why you might see two different ( types of blood clots ) in the same person . '' Risk factors for DVT include smoking , use of oral contraceptives , age ( the risk increases over age 65 ) and obesity . Blood clots : 4 things you need to know . A large long-term study published in the journal PLoS One in 2007 found that the more frequently a person travels , the higher their risk of blood clots . The blood in veins is fighting gravity to get back to the heart , Cushman said , and needs the leg muscles to help push it along . When a person is sedentary for long periods of time -- especially on a plane or in a car , where the legs are in the same position for hours -- the blood can start to clot . Blood thinners are considered standard treatment after a blood clot , experts said . `` The current recommendations are for at least three months of treatment with a blood thinner following a clot , '' Dr. Evan Lipsitz , chief of vascular surgery at New York 's Montefiore Medical Center , said in December . He was not involved in Clinton 's care . `` Each case much be individualized depending on the size and location of the clot and the risk of bleeding as a result of the treatment , '' he said . Often , patients on these medications are monitored closely , having their blood checked once a month or every couple of months to ensure that the dosage is right . Lipsitz makes his patients aware of typical blood clot symptoms ( sudden pain or swelling in the limbs , or chest pain and shortness of breath caused by a blood clot traveling toward the lungs ) so they can spot them and get treated quickly . CNN 's Jacque Wilson , Mary Snow , Danielle Dellorto and Elise Labott contributed to this report .
Mumford & Sons bassist had an operation for a blood clot . The blood was on the surface of his legs , the band says . Most blood clots are found in the legs , experts say .