The best way to fight a cold is with plenty of rest and fluids, but doctors admit that medication can make the worst symptoms more bearable. But it's important to know that no drug will actually lessen the length or severity of your cold; it can only treat the symptoms.
If the pain in the buttocks is more noticeable when sitting it may be caused by tightness in the hamstring. Proximal hamstring tendonopathy and high hamstring tendonitis is defined as inflammation originating in the hamstring, causing pain in the lower buttocks, or pelvic bone region.
Stretch yourself. Relaxing the muscles in the lower back, buttocks and upper legs through stretching will help reduce the strain on the sciatic nerve and the joints throughout the lower back and pelvis. Always stretch gently and avoid any further stretching if it causes sharp pain or if it aggravates your problem.