In Jain Dharma, the guiding principle is ahimsa — not harming even very small जीवs as far as possible.

So for fleas, lice, bed bugs, and similar insects, many Jains try to use non-violent, preventive, and removal-based methods rather than poison or extermination.

Common Jain-friendly approaches include:

• Keeping the area very clean
• Washing and sunning bedding/clothes
• Inspecting and isolating infested items
• Physically removing insects
• Using simple barriers and cleanliness to prevent spread
• Avoiding harsh chemical sprays when possible

For lice, people may use careful combing and repeated cleaning. For bed bugs or fleas, the focus is usually on removal, sanitation, and preventing reproduction, rather than directly killing them.

That said, Jain practice can differ by tradition, level of observance, and practical necessity. The main spirit is to choose the least हिंसा possible, with awareness and restraint.

So yes — many Jains do try to handle such problems through non-violent methods, as far as one can practically manage.