Yes, you are right!

Overweight is a big problem for people who suffer myoskeletal pain.  It might not be the cause, but it really increases stress on the dysfunctional joints and lead to more injury and reduce the treatment efficency. So, losing weight is a very improtant homework during the myoskeletal treatments.

If you have tickling feeling, you might have Siatica, and your lumbosacral dysfunction. 

Actually, the problems in your ankle, knee, your hip or lumbar have been years. As we know, the myoskeletal dysfunction will cause nerve system, circulatory  system, lymphatic system dysfunction ( such as edema), which will weaken immune system leading to integumentary system conditions, like dermatophytosis.

Yes.  Manual therapy would be the rational treatment for your case.