My grandparents have always back pain in winter. ☊ 
Ông bà của tôi luôn bị đau lưng vào mùa đông. ☊ Medical like: đau lưng → →
back pain ☊ back ☊
He hurt his back playing squash. ☊ hurt ☊
low back pain ☊ low ☊
patients suffering from acute back pain ☊ pain ☊