Shall we use hot or cold in Acute injury?

the answer is LOVE & PEACE

Injuries like an ankle sprain or muscle strain or any other musculoskeletal injuries will likely affect us all at some point in our lives. When they do happen people will often apply ice, take anti-inflammatories, and stop doing an activity for a few days or weeks. Past approaches to managing musculoskeletal injuries have used acronyms called ICE, RICE, and PRICE, but they only address short-term care.
With time there is advancement based on the latest research in the field of treatment of musculoskeletal injury. It’s time to integrate a little more care and kindness into the treatment of musculoskeletal injuries. There are plenty of modifications to be made. Introducing PEACE & LOVE a new acronym has now been updated in light of the most recent scientific advances in the field to guide you in rehabilitating injuries.
The PEACE acronym is for immediate care after an injury.

PEACE & LOVE stands for-

P-Protection (avoid activity & movement that increase pain during the first few days after injury).
E-Elevation (elevate the injured limb higher than the heart as often as possible to help with swelling).
A-Avoid anti-inflammatories (avoid taking anti-inflammation medication as they reduce tissue healing, avoid ICING because ice can help with pain but could potentially lead to impaired recovery in ligaments and tendons).
C-Compression (use elastic bandage & taping to reduce swelling).
E-Education (education about the cure and prevention, and avoid unnecessary passive treatment & medical investigation, and avoiding over-medication & overtreatment).
& LOVE is the acronym for starting rehab generally a few days after injury. And it stands for-
L-Load (put a load on the injured body part and resume normal activities as soon as symptoms allow, your body will tell you when it’s safe to increase the load. Loading without exacerbating pain, will gain strength in the tendon, muscles, and ligaments).
O-Optimism (negative emotion after an injury can sometimes explain symptoms more than the actual severity of the injury, so, condition your brain for optimal recovery by being realistic, confident, and positive about your recovery).
V-Vascularisation (pain-free aerobic activity like cardio-vascular activities started soon after an injury to increase blood flow to repair tissue, improves physical function, and reduce the need for pain medication).
E-Exercise (restore mobility, strength, and proprioception to reduce your chances of re-injury by adopting an active approach to recovery, don’t push through the pain and let your body guide your progression to harder exercise).
The gradual adding load will facilitate the return to normal activities and promote healing. Stretching, Strengthening and Balance exercises can help recover ROM, strength, and proprioception.
Recovery time varies according to the severity of the injury. Trust your body and listen to it. To get personalize advice consult a health care professional like a physician or physiotherapist