Welcome to HCM,
You are having skin lesions due to mosquito bite and heal with scars
You have pain after long walk.
I feel you have tendency to develop scars after healing of skin lesions.
It should be taken easy.
But, you have pain in legs and feet after long walk.
For that, you should undergo investigative procedures to rule out DM,HIV,other systemic and infectious diseases.
Local conditions should be kept in mind..like calcaneal spur
in knee,ankles or feet joints.
You consult dermatologist
and surgeon for perfect diagnosis and treatment.
I hope you might be satisfied with my answer.
Wishing you good health.
Dr. Ilyas Patel MD