My son in law got bit by not sure what but now has red stripes or lines coming from bite, it was itchy after and today couldn't squeeze or grip good?

Immediate attention: This sounds like a medical emergency. It sounds like an infection may be setting in, and if he is already having some loss of function, it is an emergency. Time is precious here, so i would call him and tell him to get to the er or an urgent care center now!

Talk to MD: Tell him to go to an urgent care center or an emergency room to be evaluated. This could be an infected bite, or a reaction from the bite. Good luck.