Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Pain may be due to gluteus muscle spasm which on action on standing. Gluteus maximus, medius and minimus are the three main buttock muscles. Gluteus maximus is biggest muscle in the body and some sources say it’s the strongest. All of these muscles may get tendon problems causing pain in the buttock. There are also a number of trigger points within these muscles that may give pain within the buttock. There are three trigger points commonly encountered in Gluteus max, another three in medius and minimus. Other possibilities like hamstring tendinopathy pain which may be triggered by overuse of muscles of hamstring. You may take rest , use cold and worm compression . Use pain killer medication like naprosyn or ibuprofen or indomethacin. If symptoms not improved please consult your physician he will examine and treat you accordingly. Hope I have answered your query. Let me know if I can assist you further.