Achilles Tendon

My dog torn her Achilles’ tendon about 3 weeks ago.  She now has a large lump about the size of a marble on her tendon. What is this?

Hello!   I don't know enough about this case to answer this question, but it's possible that the tendon may be trying to heal and that inflammatory cells and fluid are travelling to the site in order to try to repair the gap.  Unfortunately self- 'repaired' tendon is rarely, if ever,  as strong as it was previously and can often become very stiff.   For this reason, we would generally recommend getting the tendon repaired by a surgeon at the time that it happens to give it the best possible chance. Another thing that can happen when tendon is broken is that the fibres each end of the break might contract, leading to a knotting appearance. It sounds as though your vet may need to see this patient so that you can ensure that as much as possible is being done in order to help them to heal.