An ESR level of 60 is elevated and indicates systemic inflammation, but it does not confirm a specific disease. Joint pain and occasional fever may suggest conditions such as arthritis or another inflammatory problem that require evaluation. With her age and asthma, it is important to assess her overall health carefully. It would be wise to obtain further tests and a proper medical review to identify the cause and initiate appropriate treatment.

Difficulty walking due to a knee joint problem may be caused by pain, swelling, or joint damage and needs proper attention. Try to limit weight-bearing, rest, and use support, such as a stick or a knee brace, to improve stability. Applying a warm compress and doing gentle exercises as tolerated can help reduce stiffness. It would be advisable to get it checked to identify the cause and start appropriate treatment.