My husband is feeling burning sensation.

He meet with accident last june 2020, took antibiotics, paint killer after surgery for 3 mnths, now from past 3months he is feeling burning near chest daily, taking mentioned medication he feels better on medicine but if he stops again repeats, as he is feeling anxiety and stress he took psychiatrist suggestions and taking medicine as mentioned they are also troubling him with same problem, I don't understand what was the exact reason for burning day and night near chest part, anyone please suggest, he is avoiding all the spicy food, masala, tamarind, citrus food etc even though same problem he is having severe neck pain daily, feeling sleepless(not feeling sleep even at nights) exact prob is 1. Lack of sleep days together 2. Neck pain 3. Burning sensation near chest 4. During burning he is Feeling anxiety, stress, anger Please suggest what to do