Constant headacge for past 4 years. Me!

My sister has head ache for past 4 years but for last 1year the head ache is going worsen..we have taken lot treatments the head ache is relieved after taking tablets but she has taken lot of tablets she refered neurologist also taken Scan also in that they found paranasal sinusitis they did surgery for that but still now the head ache is still present only temporary relieve is there by taking tablets what to do for permanent relieve from head ache..the head ache starts mrng increasing progressively through out the day sometimes she feel nausea she has taken lot of treatments...she refered opthalm also and wearing specs also for past 2 years still no relieve Tablets taken by her is ibuprofen,aceclo plus,amigaba ls,lupirtin p,tablets taken...many other pain killer only temporary relief is there ..... I kindly request you to help me What is the pathology behind this ???what medication can cure her???pls....pls....pls....why this head ache is coming this is also my question pls help me