What Causes Swelling And Indentation In My Shin?

within the last week or two my left leg is slightly swollen from the knee on down, the lower shin area has some minor pain and when I press down on the skin, the pressure point takes a little bit to return to normal it also stays white longer, not like pushing down on soft skin and have it bounce back/return to normal and the white area where you pushed returns to normal fast. i suffer from severe anxiety and depression and agorophobia then medication I took for a long time help put a lot of weight on me withing the last year I quit smoking, stopped regular pop, and most recently changed what I eat to more vegetable heavy and salads and diet pop.