How to fix texture stretching

Tiddly

When a character is posed with an extreme bend (in the inner thigh area) , sometimes the texture stretches and distorts.  Is there an easy way to fix this or maybe a tutorial? 

Richard Haseltine

You might be able to adjust the UVs for that pose, just sliding the lines up or down without chnaging the outline position, but that would be tricky. Failing that post-work may be your best bet.