How to remove blisters on your tongue?

Look for causes. Depends on the cause of the ulceration or blistering, might be chemical from meds.Or tobacco chewing or use. Mechanical from ill fitting dentures or bridges that has sharp edges causing the ulceration , or allergic from allergies to meds. Or foods, look for the. Cause..
Self limiting. If by blisters you mean ulcerations , then they will go away on there own, as they are usually caused by trauma. Once the offender is removed...Like smoothing or filling a fractured tooth, the ulceration heals itself. If it was from a bite or a scratch then it should heal on its own. Warm salt water is helpful to expedite healing. Also a dental diode laser works well.