Our expert says:
The hard bump is probably a bleeding in the soft tissue and the sore vein could be inflammation due to this (thrombophlebitis) The iron in old blood causes and inflammatory reaction in the body to help the body to "clean" it up quicker. You have been doing the right thing by using Arnica and you can continue with this. If the area is red, warm and tender, see your doctor as you may need antibiotics - it may have developed a secondary infection
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