Mybro 16,and his height is173,my dad is 175 and he hasn't grown since like14, his hand size is small and his fingers kinda short in comparison with friends,the same thing with his shoes size,also his beard started growing on his chin..,will he grow??

From what you described, your brother has completed his growth and would not gain more height or lengthen his fingers or feet.

These are sighs of an infection. However, the blue discoloration could be various causes. Soak warm-hot water Apply antibiotic cover with dressing, bandaid. Not resolved or better within 3 days see a podiatrist or your family doctor