Honda XR125 headlight fusing

[Knucklhead/knuckey]

need advice, my sons XR125 headlight has now fused for the 3rd time in about 4 months. what could be causing it to fuse?how would i fix this?

 

[Grysalp]

 

[lecap]

 

[RobCrouch]

 

[Dux]

 

[GENERAAL]

 

[Rooikat]

 

[alexTH3man]

 

[LouisXander]

 

[Rooikat]

 

[Adventurer]