If the current bit being used is a Jointed Bit (either single or double), this may well be the problem.
The double jointed bit is actually worse, due to the added bonus of the lozenge (jellybean), this causes too much tongue pressure, so in turn the poor horse is “screaming out” - by pulling, putting its head down between its knees, head up like a giraffe or ANYTHING to try and avoid the pain and then when the horse opens it's mouth a Hannorivan Nose Band is then slapped on to quiet him down therefore acting like a band-aid.
This is the Magic mouth piece - 45 dergree curved to fit the MOUTH shape of the Horse.
No JOINT =No PINCH, No Pinch = No Pain= Happy Horse.
As these bits are already curved – they are measured as per the “Mouth” size of your horse NOT by the Traditional BIT size, therefore generally ½” SMALLER than your traditional jointed bit.