I would recommend that you place a call to your surgeon.
The bump under the incision line is likely a seroma.
A seroma is a collection of interstitial fluid and white blood cells and macrophages - all cellular components that your body recruits for repair and healing but which are not adequately recirculated back into the bloodstream and lymphatic vessels.
Some seromas disappear in their own as the body refinds the means to clear the fluid accumulation by absorbing the fluid and excreting through action of the kidneys and liver. Some seromas require tapping and draining by interventional radiology (to assure placement of the drain).
The sciatic nerve and femoral nerve bundles lie in the lower pelvis. Post-operative inflammation and the trauma of surgical handling can cause nerve root irritation.
It would be wise to see your physician to get a hands-on evaluation. Sensory nerves once irritated can become a source of chronic pain. It is always best to identify the source of nerve irritation as early as possible so that treatment/remedies to ease pressure/irritation are minimised and quell pain before it becomes eatablished and chronic.
Gentle walking up a mild/slight incline might help to stretch the posterior leg structures and ease your pain if it is due to sciatica.
Dear friend to Bella Piazza, former Colon Club member (NWGirl).
I have a permanent ileostomy and offer advice on living with an ostomy - in loving remembrance of Bella
I am on Palliative Care for broad endocrine failure + Addison's disease + osteonecrosis of both hips/jaw + immunosuppression. I live a simple life due to frail health.