Frogger00, it is imperative you get your frog tested so you know what it is you are dealing with, otherwise you could cause him more problems with improper treating regimes/medications.
For actual "Red Leg Syndrome" look up "bacterial dermatosepticemia".
"Red leg syndrome has been attributed to the bacterium
Aeromonas hydrophila without appropriate
diagnostic investigation. Clinical signs of red leg syndrome
may be caused by other infectious agents including,
but not limited to, ranaviruses (e.g., tadpole
edema virus, frog virus-3), other bacteria (T able
13.1), Chlamydia psittaci (Newcomer et ai., 1982),
and Basidiobolus ranarum (Taylor et ai., 1995). Additionally
there are noninfectious causes of ventral
erythema that are usually transient, such as may be
caused by contact with a heated substrate, chemical
irritation or the stress of being handled."
(Quote: Amphibian Medicine and Captive Husbandry, pg 162)
Also read here:
http://ilarjournal.oxfordjournals.or.../48/3/235.long