Hello and welcome to HCM, The symptoms mentioned by you are not side effects of masturbation. Thinning of hair and hair loss over crown region are suggestive of male pattern baldness and this occurs due to hormonal influence and not due to side effect of masturbation. Tiredness can be due to anemia or low hemoglobin levels. Thus get a complete hemogram to know the level of hemoglobin and other blood parameters. For fuzzy vision, a clinical assessment by an ophthalmologist is required to assess the vision. Low libido and small size of testicles requires hormonal assessment. Thus, you need to consult an urologist for low libido and small size of the testicles. Further management can be planned after clinical assessment and relevant investigations. Thanks and take care Dr Shailja Puri