Mud fever, taxonomically known as pastern dermatitis, encompasses a whole range of diseases that cause irritations and dermatitis to the lower limbs of horses. It is frequently caused by a bacterium known as Dermatophilus congolensis, which thrives in wet and muddy conditions. This infection is known to occasionally stay dormant

Recent research now suggests that particularly trotting horses on tar roads leads to more incidences of lameness than was originally thought. The benefits of riding on roads are that they are flat, generally even surfaces and many people have previously suggested that roadwork is good for joint, tendon and bone