No donot use anything like that. Instead apply a nail polish( which only used for nails) and explain him that its a harmful product which shouldn't be ingested.
Motivate him side effects of thumb sucking in future and show him some examples .
As appling any substance may have some affects and also frustates and makes child angry
No medical or orthopedic intervention should be done upto 4 years
Next Steps
montior him closely and always remind him on daily basis
Answered2023-10-11 04:01:56
Let others know if this answer was helpful