My son is 14 he has now lost his voice for 3 weeks he has been on anitboitics for 2 weeks he has no cough no sore throat nothing it seems weird it hasnt come back could this be part of pubity?

Laryngitis?: Lost his voice as in cannot talk at all or just hoarse? A viral illness can last 1-2 weeks easy but sounds like it is getting on the long side of things, should have your GP check it out.

Get checked : Can also as well as laryngitis lose the voice with reflux. Worth a check by the doctor and may need consideration of ear nose and throat referral for consideration of laryngoscopy (visualise the vocal cords) to work out what's going on

Lost voice: 3 weeks is bit long. Please review with your GP and they can examine and then refer

Laryngitis : Loss of voice is inflammation of voice box ( laryngitis) . It's usually caused by viral infection or voice abuse , antibiotics don't help . Voice rest , steam inhalation help . If not improving please see your doctor.