This treatment is being suggested on bases of the information provided. However I would like to examine & investigate your wife in detail. -Control  Hypertension, Diabetes or  metabolic disorder, if there is any. --. Sleep on a hard bed with soft bedding. --. Keep no  pillow under the head. --. Avoid painful acts & activities. --. Fomentation with warm water. Let the part not be exposed to cold. -- .Do mild exercises for &the affected part.-back and lower limbs. --.(Take help of physiotherapist or you can visit my YouTube channel Dr. N. C. Gupta and watch 'Me & My Yoga'. Kindly subscribe to the channel to get continuous guidence & notifications. It is free. https://youtube.com/channel/UCPEQc6B1ywzwin048JSu6rw -Any way it may be tried, --. Ugesic (Piroxicam) 20mg 1 tab once a day x 5days --. Caldikind plus  (Mankind) 1 tab Once  a day x 10 days. -(You may need help of your local doctor to get these medicines.) Kindly make sure, there is no allergy to any of these medicines. --For emergency treatment visit nearest hospital. --Wish your wife a quick recovery & good health. Dr N C Gupta MS (ortho.) DMC no.3624 Thanks.

Basic treatment for this is use of comfortable soft sole footwear , regular physiotherapy (eccentric calf streching) , hot water fomentation. You should use analgesic gel/spray and tablet as required. If this isn't helping you can try steroid/PRP injection.