The “pelvic floor” refers to a group of muscles that attach to the front, back, and sides of the pelvic bone and sacrum (the large fused bone at the bottom of your spine, just above the tailbone). Like a sling or hammock, these muscles support the organs in the pelvis, including the bladder, uterus or prostate, and rectum. They also wrap around your urethra, rectum, and vagina (in women).
The “prescription plan” for tight and weak muscles is different than loose and weak. I recommend going to a Pelvic Floor Physical Therapist (do a google search) or Doctor specializing in Pelvic Floor issues (Most OB/GYNs are NOT knowledgeable of this issue) to get a proper diagnosis. Otherwise, you might do the wrong thing for your condition and make it worse.
Electrical stimulation uses a small probe inserted into the vagina or rectum to stimulate your pelvic floor muscles, helping desensitize nerves and causing muscles to contract and relax. Stimulation through electrodes placed on your body may calm pain and spasms. Different kinds of electrical stimulation devices are available for home use, both for internal stimulation with a probe or for external stimulation, such as a transcutaneous electrical nerve stimulation (TENS) or similar unit, to ease pain.