Over watering or the soil is so compact that it's choking the roots, use a chopstick to poke holes in the dirt gently, and all the way to the bottom of the pot, this will supply a little oxygen to the roots, and stop watering it until it dries out.
Over watering or the soil is so compact that it's choking the roots, use a chopstick to poke holes in the dirt gently, and all the way to the bottom of the pot, this will supply a little oxygen to the roots, and stop watering it until it dries out.