I feel pain in my ears after smoking weed?

Coincidence?: Smoking (inhaling smoke, which is full of lung irritants and cancer-causing chemicals) of any kind is unhealthy. Weed is not needed for a normal life, in almost all cases (there are rare exceptions). Ear symptoms may be a coincidence or may be related to the smoking. If the ear pain never returns after one quits smoking, there probably is no problem. Otherwise, one's primary doctor can evaluate.