Bamboo swords, such as those used in martial arts like kendo or bamboo fencing, can cause some discomfort or minor pain upon impact. However, when used correctly and with proper control, the intention is not to cause significant pain or injury.

Bamboo swords, known as shinai, are designed with flexibility and lightweight construction to minimize the risk of injury during training or practice sessions. The bamboo slats that make up the shinai allow for a degree of give and absorb impact, making them safer compared to solid wooden or metal weapons.

During practice or sparring, strikes with a shinai are aimed to make clean and controlled contact, targeting specific areas as per the rules of the particular martial art. The strikes are intended to simulate realistic combat scenarios without causing unnecessary harm. Protective gear, such as helmets, gloves, chest protectors, and other padding, is often worn to further reduce the risk of injury.

That being said, accidents can still occur, and there is potential for minor discomfort, bruising, or accidental injury if strikes are executed with excessive force or improper technique. It is crucial for practitioners to receive proper training, adhere to safety guidelines, and exercise control and restraint during training sessions to maintain a safe practice environment.

In summary, while bamboo swords can cause some temporary discomfort or minor pain upon impact, their design and proper usage prioritize safety and minimize the risk of severe injury compared to solid wooden or metal weapons.