Thank you for the query.
Such symptoms can appear due to calf muscle strain
, veins thrombosis or blood accumulation due to vessel rupture (heamatoma) or both. Thrombosis gives pain, swelling, the calf becomes hard and tender. Try to straighten your husband leg in the knee and pull his feet gently down. If it will cause pain radiating to from the feet to the knee, thrombosis is very possible.
Bruised color can indicate a heamatoma but still it can be associated with thrombosis. The best way to rule both out is to perform soft tissues ultrasound
and Doppler ultrasound. Heamatoma might need an incision and evacuation, otherwise it will become an abscess
Please visit your doctor as soon as possible as deep vein thrombosis
can be life threatening.
Hope this will help.