A thigh strain or quadriceps strain is a tear in one of the quadriceps muscles at the front of the thigh. It can range from a mild discomfort to a full blown tear of most of the muscle resulting in severe pain and inability to walk.
The breakage of the stitches starts within 2 weeks of the stitching but if you want the complete stitches to disappear then the process of hydrolysis or the enzymes in our body do that in a period of 60 days and therefore it approximately takes up to 2 months for the stitches to get dissolved.
Generally, after your stitches have been removed or have dissolved and your wound has fully healed, you should be able to swim in the sea or a swimming pool. Once a wound has healed, the risk of infection decreases. Stitches can usually be removed within 7 to 10 days of surgery, although it depends on the type of wound.