Hi big guy. Just wanna verify with you, you sure it's ant compartment syndrome... Of your leg. If so, then ok, here's how I'm gonna explain it to you, which I expect your physician has told you already. Also make sure that it is certain of what you've been diagnosed with.
Ant comp syndrome is Life-Threatening or rather limb-threatening... Take note.
It is the increase in pressure by arterial bleeding into the compartment resulting the swelling. Why this has happened depends on you and is really not important now. What is important is that this "swelling" results compression on your nerves causing paresthesiae and tingling sensation or worse - loss of sensation distally from the compressed nerven including possible loss of motor function.
Because the fascia in your leg are strong... The prev guy mentioned there may be medication or other alternatives to help - that is not true! The only way so far I know of, medically, is unfortunately surgery! Take note again.
They will perform a fasciotomy on you, basically incising the fascia I mentioned earlier, to let the blood out. Otherwise you will lose your leg.
Actually I find it weird your physician hasn't recommended emergency surgery... Maybe because it hasn't progressed to be bad yet or maybe there are other underlying causes.
My consultation recommendation: make sure it is an ACS. If it is, then sorry, surgery is the only way... Unless there is some medication in the states or outside south africa that can remove blood in the compartment or relieve the pressure.
Good luck big guy and stay strong. Hope to hear how it goes.