We presume the birth details provided are of the relevant person. Your father in law has a tough and strong personality.
The current ongoing time is positive for him from health perspective although care needs to be taken till around Aug 2023, after which the health issues existing if any would gradually subside and he will be normal.
The gem Opal Crystal would help him in keeping his health condition normal, it can be worn in the ring finger of right hand.
Mithuna lagna with the lagna lord retrograde Mercury posited in the sixth house conjunct Sun; Seventh lord retrograde Jupiter exalted in the second house; Sixth lord Mars posited in the seventh house. Jupiter Maha Dasha and Mercury Antar Dasha ongoing till Aug 2023.