St. John's Wort works on nerve pain, specifically sciatic and spinal pain, in addition to compression injuries. It can also reduce bruises and heal wounds due to it's nerve regenerating effects.
Magnesium Sulfate is an effective analgesic due to it's ability to regulate calcium influx into the cells. It is known to help with both muscle and nerve pain.
Arnica spp. Wildcrafted (ethically) each Summer from the gorgeous Mountains of Montana (and sometimes Idaho). I use the whole above-ground parts of the plant to ensure a potent medicinal oil, unlike those sad little puffballs of seeds found in most commercially purchased Arnica. She is a strong anti-inflammatory herb that has been used for bruises, sprains, muscle soreness, spasms, aches, joint pain, and arthritis. Studies have shown that when used after soft tissue operatons, Arnica has helped speed up the process of healing when applied along the outside of surgical incisions (never apply Arnica in deep wounds).
Lavender: locally grown with organic farming practices, and then expertly cold-infused in organic EVOO for a relaxing scent that studies have shown can help induce deep sleep, while also fighting harmful bacteria. Breathe deeply (but don't fall asleep in the tub, please!)
Apple Cider Vinegar can restore the acidity to your skin's acid mantle, which is your body's first line of defense against invading pathogens. Supporting your immune system from the outside to the inside is your best bet against staying healthy. ACV also ensures the pH of your bath does not significantly throw off the balance of vaginal flora, unlike pesky bathbombs that are made out of baking soda.
Full Spectrum CBD from Cannabis sativa EtOH & C02 extracts. Melt away all your troubles (if aches and pains are what trouble you), and don't forget to do a little rub-a-dub-dub while you're in the tub (that's code for self-massage) to really work the oils into your skin, which has a whole system of receptors just for Cannabinoids like CBD.