I woke up this morning with a really sore foot, and on googling it seems like it may be a Morton's neuroma. It is a really tender sore spot on the underneath of my foot, between the third and fourth toe level with the ball of the foot. I already live in orthopaedic trainers because I have problems with my Achilles tendon and planter fasciitis. I'm so depressed about this because I have been really trying to be more active and now this is super painful. Has anyone had this? Is there anything I can do? Is there anything else that it could be since it came on so suddenly? Thanks.