I don't endorse many "off the shelf" products, but Flexagil cream is one product I'm happy to recommend.
By Blackmore's, Flexagil is a clinically trialled anti-inflammatory skin cream that is as effective as topically applied diclofenac gel in the treatment of osteoarthritis. Flexagil can also be used for acute inflammation and injury, provided it's applied in line with Blackmore's recommendations.
Containing Comfrey (Symphytum officinale) extract at almost double the strength of most other comfrey ointments, Flexagil is easy to rub on and absorbs well. Other ingredients include lavender oil and spruce needle oil, giving Flexagil a light fragrance that won't make your eyes water (unlike most 'heat' rubs for arthritic pain). There is a peanut oil base in Flexagil, so I don't recommend it for those with peanut allergies.
Flexagil can be rubbed on to the affected area up to 4 times daily, and I find my clients usually have significant relief from their pain within a short time.
Comfrey used to be referred to as 'knitbone' in medieval times, having a reputation for speeding up a fracture repair. I've used comfrey on a client with great success, prior treatment including 3 months in a cast/backslab with no healing of the fracture, and the only offered medical treatment being surgery with insertion of titanium plates and screws. This client rubbed on comfrey ointment 3 times daily, the fracture was x-rayed 2 weeks later and was shown to be fully knit with no need for surgery!
Comfrey grows very easily and rapidly, but it's really important to use it only topically and not orally. Containing chemicals called pyrrolizidine alkaloids, comfrey is hepatotoxic (damaging to the liver) and possibly carcinogenic (cancer causing). Two of my clients presenting with significantly raised liver enzymes (showing liver damage in blood tests) had been including comfrey leaves in salads, and when I counselled them not to eat comfrey, their liver enzymes began decreasing until they reached the normal reference range.
For arthritic or inflammatory pain, bruising and even for fractures, you can use comfrey with confidence but, please, just don't eat this wonderful herb!