You may hear a clicking noise when you move your hip, but that sound is not necessarily a hip flexor issue. Siegrist says the clicking isn't generally the hip flexor alone and often comes from a moving part, like the joint. "Maybe there is a loose body in the joint or loose cartilage at the edge of the hip joint that is mechanically getting irritated,” she says.
You can strain or tear one or more of your hip flexors when you make sudden movements such as changing directions while running or kicking. Sports and athletic activities where this is likely to occur include running, football, soccer, martial arts, dancing, and hockey. In everyday life, you can strain a hip flexor when you slip and fall, for example.