Arnica/wolfs bane

Pain Relief: Arnica is widely used for alleviating muscle and joint pain, including pain from arthritis and following surgery.
Reduced Swelling and Bruising: Arnica is commonly used topically to help reduce swelling and speed up the healing of bruises, according to Healthline. Studies have shown that topical application of arnica can significantly reduce bruising compared to a placebo after 14 days.
Anti-inflammatory Effects: The active compounds in arnica, particularly helenalin, are believed to have anti-inflammatory effects that may help reduce inflammation associated with injuries and conditions like arthritis.
Improved Circulation: Arnica may help improve blood circulation in the area where it's applied.
Potential for Osteoarthritis: Research suggests that arnica can be as effective as ibuprofen in relieving pain and improving function in people with osteoarthritis of the hands or knees.
Potential Benefits for Neuropathy Symptoms: Arnica may help with burning and tingling sensations associated with neuropathy, potentially by promoting circulation.
May Aid Hair Growth: Some sources suggest that arnica may help stimulate hair growth and strengthen hair, potentially by increasing the lifespan of hair strands and fending off premature graying. 
Skin Health: Arnica's anti-inflammatory and antioxidant properties may help reduce redness, irritation, and puffiness of the skin, potentially improving overall skin texture.